Harken 2637 40mm Carbo Block – Swivel W/ Becket

Low-friction Carbo AirBlocks® are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming.

Carbo AirBlocks® are 60% stronger and 30% lighter than our Classic blocks. Use the 40 mm Carbo for jib and mainsheet systems on high-performance dinghies and for loaded control lines on small keelboats.

The nylon-resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Sheaves spin on high-load ball bearings with fitted races for low-friction operation. Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.

Use for:

• Main/jib sheets

• Mainsheet fine-tune
  

• Control lines
  

• Vangs
  

• Cunninghams
  

• Outhauls

Specifications:

• Sheave Ø (mm) – 40 mm

• Length (mm) – 102 mm

• Weight (g) – 48 g

• Shackle pin Ø (mm) – 4 mm

• Maximum line Ø (mm) – 10 mm

• Maximum working load (kg) – 220 kg

• Breaking load (kg) – 735 kg