Harken 40mm Carbo Blocks

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
Harken 40mm Carbo Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Block w/Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Double Swivel Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Double Swivel Block w/Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm 90 degree Fixed Head Carbo Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Block w/Cam Cleat
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Block w/Cam Cleat and Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Block w/Spring and Eyestrap
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Cheek Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Fixed Double Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Fixed Double w/Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Pivoting Lead Block w /Carbo Cam
High-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and..
Harken 40mm Carbo Pivoting Lead Block w/ Aluminum Cam
High-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and..
Harken 40mm Carbo Quad Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Triple Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 40mm Carbo Triple Block w/Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
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