Skip to product information
1 of 2


Harken 40mm Carbo Air Double Swivel Block [2638]

Regular price $82.95 USD
Regular price $94.55 USD Sale price $82.95 USD
Sale Sold out
Shipping calculated at checkout.

40mm Carbo Air Double Swivel Block

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


  • Sheave Ø (mm)40 mm
  • Sheave Ø (in)1 9/16 in
  • Maximum line Ø (mm)10 mm
  • Maximum line Ø (in)3/8 in
  • Maximum working load (kg)440 kg
  • Maximum working load (lb)970 lb

Quick Guide (pdf)


Shipping & Returns


Care Instructions

No reviews