+7 (812) 331-45-18, +7 (921) 380-77-97
office@bastini.ru

Toggle Nav
Menu
Account
Settings
Language
English
Search
Advanced Search
85. Welding Equipment

85. Welding Equipment

Impa Catalog (international marine purchasing association)

85. Welding Equipment

Loading...
View as Grid List

Items 601-720 of 760

Set Descending Direction
  1. ELECTRODE CHS022 (022R) 2.5MM, 2KG FOR STAINLESS STEEL
    ELECTRODE CHS022 (022R) 2.5MM, 2KG FOR STAINLESS STEEL
    Brand: IMPA
  2. ELECTRODE CHS022 (022R) 3.2MM, 2KG FOR STAINLESS STEEL
    ELECTRODE CHS022 (022R) 3.2MM, 2KG FOR STAINLESS STEEL
    Brand: IMPA
  3. ELECTRODE CHS022 (022R) 4.0MM, 2KG FOR STAINLESS STEEL
    ELECTRODE CHS022 (022R) 4.0MM, 2KG FOR STAINLESS STEEL
    Brand: IMPA
  4. ELECTRODE CHS022 (022R) 5.0MM, 2KG FOR STAINLESS STEEL
    ELECTRODE CHS022 (022R) 5.0MM, 2KG FOR STAINLESS STEEL
    Brand: IMPA
  5. ELECTRODE CHH308 2.5MM 5KG, FOR STAINLESS STEEL
    ELECTRODE CHH308 2.5MM 5KG, FOR STAINLESS STEEL
    Brand: IMPA
  6. ELECTRODE CHH308 3.2MM 5KG, FOR STAINLESS STEEL
    ELECTRODE CHH308 3.2MM 5KG, FOR STAINLESS STEEL
    Brand: IMPA
  7. ELECTRODE CHH308 4.0MM 5KG, FOR STAINLESS STEEL
    ELECTRODE CHH308 4.0MM 5KG, FOR STAINLESS STEEL
    Brand: IMPA
  8. ELECTRODE CHH308 5.0MM 5KG, FOR STAINLESS STEEL
    ELECTRODE CHH308 5.0MM 5KG, FOR STAINLESS STEEL
    Brand: IMPA
  9. CONTAINER STORAGE FOR WELDING, ROD 350MM WITH STRAP
    CONTAINER STORAGE FOR WELDING, ROD 350MM WITH STRAP
    Brand: IMPA
  10. CONTAINER STORAGE FOR WELDING, ROD 450MM WITH STRAP
    CONTAINER STORAGE FOR WELDING, ROD 450MM WITH STRAP
    Brand: IMPA
  11. OVEN FOR WELDING ROD TYPE2, STORAGE CAPACITY 10KGS
    OVEN FOR WELDING ROD TYPE2, STORAGE CAPACITY 10KGS
    Brand: IMPA
  12. OVEN FOR WELDING ROD TYPE5, STORAGE CAPACITY 25KGS
    OVEN FOR WELDING ROD TYPE5, STORAGE CAPACITY 25KGS
    Brand: IMPA
  13. ELECTRODE DC POINTED GOUGING, 6.3X305MM(1/4"X12") 250-300AMP
    ELECTRODE DC POINTED GOUGING, 6.3X305MM(1/4"X12") 250-300AMP
    Brand: IMPA
  14. ELECTRODE DC POINTED GOUGING, 8X305MM(5/16"X12") 350-400AMP
    ELECTRODE DC POINTED GOUGING, 8X305MM(5/16"X12") 350-400AMP
    Brand: IMPA
  15. ELECTRODE DC POINTED GOUGING, 10X305MM(3/8"X12") 400-450AMP
    ELECTRODE DC POINTED GOUGING, 10X305MM(3/8"X12") 400-450AMP
    Brand: IMPA
  16. ELECTRODE DC POINTED GOUGING, 13X355MM(1/2"X14") 600-700AMP
    ELECTRODE DC POINTED GOUGING, 13X355MM(1/2"X14") 600-700AMP
    Brand: IMPA
  17. ELECTRODE DC JOINTED GOUGING, 10X355MM(3/8"X14") 500AMP
    ELECTRODE DC JOINTED GOUGING, 10X355MM(3/8"X14") 500AMP
    Brand: IMPA
  18. ELECTRODE DC JOINTED GOUGING, 11X355MM(7/16"X14") 600AMP
    ELECTRODE DC JOINTED GOUGING, 11X355MM(7/16"X14") 600AMP
    Brand: IMPA
  19. ELECTRODE DC JOINTED GOUGING, 13X355MM(1/2"X14") 750AMP
    ELECTRODE DC JOINTED GOUGING, 13X355MM(1/2"X14") 750AMP
    Brand: IMPA
  20. ELECTRODE DC JOINTED GOUGING, 10X430MM(3/8"X17") 550AMP
    ELECTRODE DC JOINTED GOUGING, 10X430MM(3/8"X17") 550AMP
    Brand: IMPA
  21. ELECTRODE DC JOINTED GOUGING, 13X430MM(1/2"X17") 750AMP
    ELECTRODE DC JOINTED GOUGING, 13X430MM(1/2"X17") 750AMP
    Brand: IMPA
  22. ELECTRODE DC JOINTED GOUGING, 16X430MM(5/8"X17") 1000AMP
    ELECTRODE DC JOINTED GOUGING, 16X430MM(5/8"X17") 1000AMP
    Brand: IMPA
  23. ELECTRODE DC POINTED GOUGING, 4X305MM(5/32"X12") 150-200AMP
    ELECTRODE DC POINTED GOUGING, 4X305MM(5/32"X12") 150-200AMP
    Brand: IMPA
  24. ELECTRODE DC POINTED GOUGING, 5X305MM(3/16"X12") 200-250AMP
    ELECTRODE DC POINTED GOUGING, 5X305MM(3/16"X12") 200-250AMP
    Brand: IMPA
  25. ELECTRODE DC POINTED GOUGING, 13X305MM(1/2"X12") 600-700AMP
    ELECTRODE DC POINTED GOUGING, 13X305MM(1/2"X12") 600-700AMP
    Brand: IMPA
  26. ELECTRODE DC JOINTED GOUGING, 8X355MM(5/16"X14") 450AMP
    ELECTRODE DC JOINTED GOUGING, 8X355MM(5/16"X14") 450AMP
    Brand: IMPA
  27. ELECTRODE DC JOINTED GOUGING, 15X355MM(5/8"X14") 1000AMP
    ELECTRODE DC JOINTED GOUGING, 15X355MM(5/8"X14") 1000AMP
    Brand: IMPA
  28. ELECTRODE DC JOINTED GOUGING, 19X355MM(3/4"X14") 1300AMP
    ELECTRODE DC JOINTED GOUGING, 19X355MM(3/4"X14") 1300AMP
    Brand: IMPA
  29. ELECTRODE DC JOINTED GOUGING, 19X430MM(3/4"X17") 1300AMP
    ELECTRODE DC JOINTED GOUGING, 19X430MM(3/4"X17") 1300AMP
    Brand: IMPA
  30. ELECTRODE DC FLAT GOUGING, 5X15X305MM 300-400AMP
    ELECTRODE DC FLAT GOUGING, 5X15X305MM 300-400AMP
    Brand: IMPA
  31. ELECTRODE CHN337 3.2MM 2KG, FOR NICKEL/NICKEL-ALLOY STEEL
    ELECTRODE CHN337 3.2MM 2KG, FOR NICKEL/NICKEL-ALLOY STEEL
    Brand: IMPA
  32. ELECTRODE CHN337 4.0MM 2KG, FOR NICKEL/NICKEL-ALLOY STEEL
    ELECTRODE CHN337 4.0MM 2KG, FOR NICKEL/NICKEL-ALLOY STEEL
    Brand: IMPA
  33. ELECTRODE YAWATA WELD 182AC, 2.6MM 2.5KG FOR NI-ALLOY STEEL
    ELECTRODE YAWATA WELD 182AC, 2.6MM 2.5KG FOR NI-ALLOY STEEL
    Brand: IMPA
  34. ELECTRODE YAWATA WELD 182AC, 3.2MM 2.5KG FOR NI-ALLOY STEEL
    ELECTRODE YAWATA WELD 182AC, 3.2MM 2.5KG FOR NI-ALLOY STEEL
    Brand: IMPA
  35. ELECTRODE YAWATA WELD 182AC, 4.0MM 5KG FOR NI-ALLOY STEEL
    ELECTRODE YAWATA WELD 182AC, 4.0MM 5KG FOR NI-ALLOY STEEL
    Brand: IMPA
  36. ELECTRODE YAWATA WELD 182AC, 5.0MM 5KG FOR NI-ALLOY STEEL
    ELECTRODE YAWATA WELD 182AC, 5.0MM 5KG FOR NI-ALLOY STEEL
    Brand: IMPA
  37. ELECTRODE, FOR NICKEL & NICKEL-ALLOY
    ELECTRODE, FOR NICKEL & NICKEL-ALLOY
    Brand: IMPA
  38. ELECTRODE KTGS50 1.6MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    ELECTRODE KTGS50 1.6MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    Brand: IMPA
  39. ELECTRODE KTGS50 2.0MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    ELECTRODE KTGS50 2.0MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    Brand: IMPA
  40. ELECTRODE KTGS50 2.4MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    ELECTRODE KTGS50 2.4MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    Brand: IMPA
  41. ELECTRODE KTGS50 3.2MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    ELECTRODE KTGS50 3.2MM 5KG FOR, MILD STEEL&50KGF/MM2 HT STEEL
    Brand: IMPA
  42. ELECTRODE S-13Z 2.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-13Z 2.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  43. ELECTRODE S-13Z 2.6MM 5KG, FOR MILD STEEL
    ELECTRODE S-13Z 2.6MM 5KG, FOR MILD STEEL
    Brand: IMPA
  44. ELECTRODE S-13Z 3.2MM 5KG, FOR MILD STEEL
    ELECTRODE S-13Z 3.2MM 5KG, FOR MILD STEEL
    Brand: IMPA
  45. ELECTRODE S-13Z 4.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-13Z 4.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  46. ELECTRODE S-13Z 5.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-13Z 5.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  47. ELECTRODE S-13Z 6.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-13Z 6.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  48. ELECTRODE S-03Z 2.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-03Z 2.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  49. ELECTRODE S-03Z 2.6MM 5KG, FOR MILD STEEL
    ELECTRODE S-03Z 2.6MM 5KG, FOR MILD STEEL
    Brand: IMPA
  50. ELECTRODE S-03Z 3.2MM 5KG, FOR MILD STEEL
    ELECTRODE S-03Z 3.2MM 5KG, FOR MILD STEEL
    Brand: IMPA
  51. ELECTRODE S-03Z 4.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-03Z 4.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  52. ELECTRODE S-03Z 5.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-03Z 5.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  53. ELECTRODE S-03Z 6.0MM 5KG, FOR MILD STEEL
    ELECTRODE S-03Z 6.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  54. ELECTRODE G-300 2.6MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 2.6MM 5KG, FOR MILD STEEL
    Brand: IMPA
  55. ELECTRODE G-300 3.2MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 3.2MM 5KG, FOR MILD STEEL
    Brand: IMPA
  56. ELECTRODE G-300 4.0MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 4.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  57. ELECTRODE G-300 4.5MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 4.5MM 5KG, FOR MILD STEEL
    Brand: IMPA
  58. ELECTRODE G-300 5.0MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 5.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  59. ELECTRODE G-300 6.0MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 6.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  60. ELECTRODE G-300 7.0MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 7.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  61. ELECTRODE G-300 8.0MM 5KG, FOR MILD STEEL
    ELECTRODE G-300 8.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  62. ELECTRODE FT-51 2.0MM 2.5KG, FOR MILD STEEL
    ELECTRODE FT-51 2.0MM 2.5KG, FOR MILD STEEL
    Brand: IMPA
  63. ELECTRODE FT-51 2.6MM 2.5KG, FOR MILD STEEL
    ELECTRODE FT-51 2.6MM 2.5KG, FOR MILD STEEL
    Brand: IMPA
  64. ELECTRODE FT-51 3.2MM 5KG, FOR MILD STEEL
    ELECTRODE FT-51 3.2MM 5KG, FOR MILD STEEL
    Brand: IMPA
  65. ELECTRODE FT-51 4.0MM 5KG, FOR MILD STEEL
    ELECTRODE FT-51 4.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  66. ELECTRODE FT-51 5.0MM 5KG, FOR MILD STEEL
    ELECTRODE FT-51 5.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  67. ELECTRODE FT-51 6.0MM 5KG, FOR MILD STEEL
    ELECTRODE FT-51 6.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  68. ELECTRODE B-1 2.6MM 5KG, FOR MILD STEEL
    ELECTRODE B-1 2.6MM 5KG, FOR MILD STEEL
    Brand: IMPA
  69. ELECTRODE B-1 3.2MM 5KG, FOR MILD STEEL
    ELECTRODE B-1 3.2MM 5KG, FOR MILD STEEL
    Brand: IMPA
  70. ELECTRODE B-1 4.0MM 5KG, FOR MILD STEEL
    ELECTRODE B-1 4.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  71. ELECTRODE B-1 4.5MM 5KG, FOR MILD STEEL
    ELECTRODE B-1 4.5MM 5KG, FOR MILD STEEL
    Brand: IMPA
  72. ELECTRODE B-1 5.0MM 5KG, FOR MILD STEEL
    ELECTRODE B-1 5.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  73. ELECTRODE B-1 6.0MM 5KG, FOR MILD STEEL
    ELECTRODE B-1 6.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  74. ELECTRODE NS-03HI 2.0MM 5KG, FOR MILD STEEL
    ELECTRODE NS-03HI 2.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  75. ELECTRODE NS-03HI 2.6MM 5KG, FOR MILD STEEL
    ELECTRODE NS-03HI 2.6MM 5KG, FOR MILD STEEL
    Brand: IMPA
  76. ELECTRODE NS-03HI 3.2MM 5KG, FOR MILD STEEL
    ELECTRODE NS-03HI 3.2MM 5KG, FOR MILD STEEL
    Brand: IMPA
  77. ELECTRODE NS-03HI 4.0MM 5KG, FOR MILD STEEL
    ELECTRODE NS-03HI 4.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  78. ELECTRODE NS-03HI 5.0MM 5KG, FOR MILD STEEL
    ELECTRODE NS-03HI 5.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  79. ELECTRODE NS-03HI 6.0MM 5KG, FOR MILD STEEL
    ELECTRODE NS-03HI 6.0MM 5KG, FOR MILD STEEL
    Brand: IMPA
  80. TROUSERS WELDING WITH BELT, FLAME RETARDANT M
    TROUSERS WELDING WITH BELT, FLAME RETARDANT M
    Brand: IMPA
  81. TROUSERS WELDING WITH BELT, FLAME RETARDANT L
    TROUSERS WELDING WITH BELT, FLAME RETARDANT L
    Brand: IMPA
  82. TROUSERS WELDING WITH BELT, FLAME RETARDANT XL
    TROUSERS WELDING WITH BELT, FLAME RETARDANT XL
    Brand: IMPA
  83. TROUSERS WELDING WITH BELT, FLAME RETARDANT XXL
    TROUSERS WELDING WITH BELT, FLAME RETARDANT XXL
    Brand: IMPA
  84. JACKET WELDING FLAME RETARDANT, M
    JACKET WELDING FLAME RETARDANT, M
    Brand: IMPA
  85. JACKET WELDING FLAME RETARDANT, L
    JACKET WELDING FLAME RETARDANT, L
    Brand: IMPA
  86. JACKET WELDING FLAME RETARDANT, XL
    JACKET WELDING FLAME RETARDANT, XL
    Brand: IMPA
  87. JACKET WELDING FLAME RETARDANT, XXL
    JACKET WELDING FLAME RETARDANT, XXL
    Brand: IMPA
  88. HELMET WELDING WITH HEADGEAR
    HELMET WELDING WITH HEADGEAR
    Brand: IMPA
  89. SPECTACLE SAFETY ANTI-SCRATCH, ANTI-FOG CLEAR
    SPECTACLE SAFETY ANTI-SCRATCH, ANTI-FOG CLEAR
    Brand: IMPA
  90. SPECTACLE SAFETY ANTI-SCRATCH, ANTI-FOG IR SHADE 5
    SPECTACLE SAFETY ANTI-SCRATCH, ANTI-FOG IR SHADE 5
    Brand: IMPA
  91. SPECTACLE SAFETY WITH, INTERCHANGEABLE LENSES
    SPECTACLE SAFETY WITH, INTERCHANGEABLE LENSES
    Brand: IMPA
  92. WELDER SLEEVES, CHROMED LEATHER
    WELDER SLEEVES, CHROMED LEATHER
    Brand: IMPA
  93. WELDER APRON CHROMED LEATHER
    WELDER APRON CHROMED LEATHER
    Brand: IMPA
  94. WELDER LEGGINGS, CHROMED LEATHER
    WELDER LEGGINGS, CHROMED LEATHER
    Brand: IMPA
  95. GOGGLE WELDER METAL FLIP-UP, 45MM LENS DIAM
    GOGGLE WELDER METAL FLIP-UP, 45MM LENS DIAM
    Brand: IMPA
  96. GOGGLE WELDER PLASTIC, CONTOUR-MOULD 50MM LENS DIAM
    GOGGLE WELDER PLASTIC, CONTOUR-MOULD 50MM LENS DIAM
    Brand: IMPA
  97. WELDER GLOVES TWO FINGERS
    WELDER GLOVES TWO FINGERS
    Brand: IMPA
  98. WELDER GLOVES THREE FINGERS
    WELDER GLOVES THREE FINGERS
    Brand: IMPA
  99. WELDER GLOVES FIVE FINGERS
    WELDER GLOVES FIVE FINGERS
    Brand: IMPA
  100. SPARE LENS FOR GAS WELDING, 45MM DIAM GY DARK GREEN YELLOW
    SPARE LENS FOR GAS WELDING, 45MM DIAM GY DARK GREEN YELLOW
    Brand: IMPA
  101. SPARE LENS FOR GAS WELDING, 45MM DIAM G3 GREEN
    SPARE LENS FOR GAS WELDING, 45MM DIAM G3 GREEN
    Brand: IMPA
  102. SPARE LENS FOR GAS WELDING, 45MM DIAM G2 DARK GREEN
    SPARE LENS FOR GAS WELDING, 45MM DIAM G2 DARK GREEN
    Brand: IMPA
  103. SPARE LENS FOR GAS WELDING, 50MM DIAM NO.3 DARK GREEN
    SPARE LENS FOR GAS WELDING, 50MM DIAM NO.3 DARK GREEN
    Brand: IMPA
  104. SPARE LENS FOR GAS WELDING, 50MM DIAM CLEAR
    SPARE LENS FOR GAS WELDING, 50MM DIAM CLEAR
    Brand: IMPA
  105. SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.8 DARK GREEN
    SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.8 DARK GREEN
    Brand: IMPA
  106. SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.9 DARK GREEN
    SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.9 DARK GREEN
    Brand: IMPA
  107. SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.11 DARK GREEN
    SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.11 DARK GREEN
    Brand: IMPA
  108. SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.12 DARK GREEN
    SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.12 DARK GREEN
    Brand: IMPA
  109. SPARE PLATE FOR ARC WELDING, 105X50X2MM CLEAR
    SPARE PLATE FOR ARC WELDING, 105X50X2MM CLEAR
    Brand: IMPA
  110. SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.10 DARK GREEN
    SPARE PLATE FOR ARC WELDING, 105X50X3MM NO.10 DARK GREEN
    Brand: IMPA
  111. HANDSHIELD HANDLE INSIDE TYPE
    HANDSHIELD HANDLE INSIDE TYPE
    Brand: IMPA
  112. HANDSHIELD HANDLE OUTSIDE TYPE
    HANDSHIELD HANDLE OUTSIDE TYPE
    Brand: IMPA
  113. VISOR ARCFLASH PROTECT V-GARD, COMPAT. W/HELMET MOUNT EARMUFF
    VISOR ARCFLASH PROTECT V-GARD, COMPAT. W/HELMET MOUNT EARMUFF
    Brand: IMPA
  114. VISOR ARCFLASH PROTECT V-GARD, W/EXTEND EAR PROTECTIVE SHAPE
    VISOR ARCFLASH PROTECT V-GARD, W/EXTEND EAR PROTECTIVE SHAPE
    Brand: IMPA
  115. ARC FLASH PROTECT PREMIUM KIT, MSA EN166 & GS-ET-29 CLASS 2
    ARC FLASH PROTECT PREMIUM KIT, MSA EN166 & GS-ET-29 CLASS 2
    Brand: IMPA
  116. GAUGE WELDING STAINLESS STEEL
    GAUGE WELDING STAINLESS STEEL
    Brand: IMPA
  117. STICK THERMOMELT TEMPERATURE, 75°C
    STICK THERMOMELT TEMPERATURE, 75°C
    Brand: IMPA
  118. STICK THERMOMELT TEMPERATURE, 150°C
    STICK THERMOMELT TEMPERATURE, 150°C
    Brand: IMPA
  119. STICK THERMOMELT TEMPERATURE, 175°C
    STICK THERMOMELT TEMPERATURE, 175°C
    Brand: IMPA
  120. STICK THERMOMELT TEMPERATURE, 225°C
    STICK THERMOMELT TEMPERATURE, 225°C
    Brand: IMPA
Page
per page
Contact us