Harken 57 mm Triple Carbo Block – Swivel
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.
| Imperial | Metric | |
| Sheave Diameter | 2 1/4 in | 57 mm |
| Max Line Diameter | 3/8 in | 10 mm |
| Max Working Load | 2380 lb | 1080 kg |


