Series 40 All Purpose Block - Single - Loop TopAll 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.Features:Exceptionally high working loadsLow maintenance, long service lifeSelf-lubricating sheaveApplications:MainsheetHalyardVangSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26')Materials:U.V. stabilized Acetal sheavesImpact and U.V. resistant, fiber reinforced Nylon cheeksGrade 316 stainless steel bearing raceGrade 316 stainless steel load strap and head fittingSpecifications:Sheave : 40mm(1-9/16)Max. Rope : 10mm(7/16)Pin : 5mm(3/16)M.W.L.: 400kg(880lbs)B. L.: 1,000kg(2,200lbs)Weight: 54g(1.9oz)