These stainless steel blocks have ball bearings and aluminum sheaves. Superior to other blocks that use plastic cheeks and plastic sheaves, they won't deteriorate in the sun. This is especially important in southern latitudes like Florida, the Gulf Coast and Southern California.
4:1 mechanical advantage with a high quality cam cleat. Complete with line, two hounds, and mounting hardware for use on the all Catalina 22 Sports, and the Catalina 22 and Catalina 25 built after 1985 (after an eye was provided on the standard mast step for the bottom end of the boom vang).