Harken 57 mm Aluminum Narrow Mast Collar Teardrop Cruising ESP Block — 6 mm Clevis

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats.


  • Breaking load (kg) 1497
  • Clevis pin Ø (mm) 6
  • Length (mm) 89
  • Maximum line Ø (mm) 10
  • Maximum working load (kg) 748
  • Sheave Ø (mm) 57
  • Weight (g) 94

Stay in touch