Series 40 Ball Bearing Block - Single - Universal HeadSheaves running on Acetal or TorlonA(R) ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock(TM) universal head can be fixed in either of two planes, or free to swivel as required.Features:Low friction Acetal or TorlonA(R) bearing systemLightweightCheek cut-outs for easy bearing maintenanceCaptive Lock(TM) universal headSlotted pin shackle eliminates fouled linesApplications:MainsheetHalyardVangSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26')Materials:U.V. Stabilized Acetal sheavesAcetal ball bearingsImpact and U.V. resistant, fiber reinforced Nylon cheeksGrade 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.: 350kg(770lbs)B. L.: 1,000kg(2,200lbs)Weight: 70g(2.5oz)