Harken Midrange, Cruising ESP Stand-up Base

Stand-up bases allow a wide variety of blocks to be held upright, swivel freely, or pivot so lines have a fairlead under load. Use the 1634 stand-up base with Midrange blocks and 57 mm or 75 mm Cruising ESP blocks. Block headpost fits into socket without shackle.


  • Base Ø (mm) 73
  • Breaking load (kg) 3175
  • Fasteners (mm) 6 RH
  • Height (mm) 49
  • Maximum working load (kg) 1588
  • Pin Ø (mm) 8
  • Use with blocks Midrange/Cruising ESP
  • Weight (g) 255

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