Harken 40mm Double Block with Becket 

Murrays Part# 28-2643

​Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.

Specifications: 

• 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.

Ronstan Part# 2643