Harken 40mm Twing Block
 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 |
| Length (mm) | 89 mm |
| Length (in) | 3 1/2 in |
| Weight (g) | 86 g |
| Weight (oz) | 3 oz |
| Maximum line Ø (mm) | 12 mm |
| Maximum line Ø (in) | 3/8 in |
| Maximum working load (kg) | 300 kg |
| Maximum working load (lb) | 661 lb |
| Breaking load (kg) | 825 kg |
| Breaking load (lb) | 1818 lb |
