Series 3 Blocks Sgl Block,Swivel Shackle Excellent for use on high performance racing dinghies, daysailors, small cruisers and control line applications on larger boats. The marine environment demands a block that performs, with quality that lasts. Stainless steel or aluminum with white Delrin sheaves Sheave diameter 1 716 Pin diameter 316 SWL 1,000 lbs.
