This Harken ball bearing micro single block with stainless side plates is a small block with high load capabilities. It is a premium quality block for your trapeze return system. Either swage in place or hang with #21-0615 shackle. Block has 7/8" sheave, Delrin ball bearings and 1/4" maximum line capacity. Safe working load is 200 lbs.; breaking strength is 1200 lbs. 1-1/2" long. Harken #224. Hobie Cat® uses #H224 for this item.