Overview Reviews Similar Products –> Product Description Series 40 All Purpose Block – Single – Stand Up All 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 required. Features: Exceptionally high working loads Low maintenance, long service life Self-lubricating sheave Captive Lock universal head Mount with 2 x 5mm (3/16″) fasteners (not supplied) 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 : 40mm(1-9/16″) Max. Rope : 10mm(7/16″) M.W.L.: 400kg(880lbs) B. L.: 800kg(1,760lbs) Weight: 72g(2.5oz) Product Videos Custom Field Product Reviews Write a Review Write a Review Ronstan Ronstan Series 40 All Purpose Block – Single – Stand Up Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *