Series 50 All Purpose Block - Single - Universal 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. Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as requiredFeatures:Exceptionally high working loadsLow maintenance, long service lifeSelf lubricating sheaveCaptive Lock™ universal headSlotted pin shackle eliminates fouled linesApplications:Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10M(33')Materials:Nylatron® sheaveGrade 316 stainless steel load strap and head fittingImpact and U.V. resistant, fiber reinforced Nylon cheeksSpecifications:Sheave Ø: 50mm(2")Max. Rope Ø: 12mm(1/2")Max. Pin Ø: 5mm(3/16")M.W.L.: 750kg(1,650lbs)B. L.: 1,500kg(3,310lbs)Weight: 118g(4.1oz)