pstrongSeries 15 Ball Bearing Utility Block - Double, Loop HeadstrongppstrongFeatures:strongpulliSmallest and lightest ball bearing block availableliliPrecision molded acetal sheave running on stainless steel ball bearings provide high performance & low frictionliliSingle loop head blocks include an O-ring to separate running line from head lashing or fixingliulpstrongApplications:strongpulliDinghy control linesliliVangs, cunninghams and tweakersliliShock cord tensioning systemsliulpstrongMaterials:strongpulliBB sheaves: UV stabilized acetalliliBall bearings: Stainless steelliliCheeks: Grade 316 stainless steelliul!-- cis2:mm5lnZ1k --