Series 40 All Purpose Block - Double Block - Full Swivel HeadAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Head swivels freely.Features: Exceptionally high working loads; Low maintenance, long service life; Self-lubricating sheave; Slotted pin shackle eliminates fouled lines; Two way head post; Applications: Mainsheet; Halyard; Vang; Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26'); Materials: U.V. stabilized Acetal sheaves; Impact and U.V. resistant, fiber reinforced Nylon cheeks; Grade 316 stainless steel bearing race; Grade 316 stainless steel load strap and head fitting; Specifications: Sheave A~: 40mm(1-9/16"); Max. Rope A~: 10mm(7/16"); Pin A~: 5mm(3/16"); M.W.L.: 600kg(1,320lbs); B. L.: 1,200kg(2,650lbs); Weight: 135g(4.8oz); - cis2:mm5mnJlm -