Harken 57mm Carbo Block with Swivel
The Harken 57mm Carbo Block with Swivel is a low-friction Carbo Air block that is 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. They can be used to replace the single Seaway blocks on a Hobie mainsheet system. Ideal for 8-10m lines, common on many classes of dingy and small catamarans.