Series 20 Ball Bearing Block – Single – Loop TopFeatures:Low frictionHigh static and dynamic load capacityLightweightPrecision molded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance & low frictionCan be fitted with a shackle in either of two planes to allow correct alignment of the blockApplications:Dinghy control linesDinghy VangsCunninghamsTraveller controlsMaterials:U.V. Stabilized Acetal sheavesStainless steel ball bearingsGrade 316 stainless steel load strap and head fittingImpact and UV resistant, fiber reinforced Nylon cheeks=Specifications:Sheave :20mm(3/4″)Max. Rope :6mm(1/4″)M.W.L.:250kg(550lbs)B. L.:550kg(1,210lbs)Weight:16g(0.6oz)