Harken 57mm Aluminum Block with Swivel (H3215)

Black Magic Air blocks are the choice for larger racing or touring boats. These lightweight, responsive, efficient blocks are designed for use on pedestals or lifts that are used a lot. The side plates and spindles are Hard Lube anodized, which provides excellent UV protection and a durable surface. The Torlo needle bearings are prevented from hitting each other and are held in position by a guide collar.