Harken's low-friction carbo air blocks are lightweight, strong, reliableand affordable. The small, compact sailing blocks have very high working loads to ensure safe, easy trimming.
Technical Specifications:
| Sheave Diameter | 29mm | 40mm | 57mm | 75mm |
| Length | 73mm | 94mm | 121mm | 152mm |
| Weight | 51g | 86g | 178g | 402g |
| Shackle Pin Diameter | 5mm | 5mm | 6mm | 8mm |
| Maximum Line Diameter | 8mm | 10mm | 10mm | 14mm |
| Maximum Working Load | 299kg | 440kg | 720kg | 1100kg |
| Breaking Load | 737kg | 1080kg | 1500kg | 2722kg |


