Series 15 Ball Bearing Utility Block - Exit BlockFeatures:Smallest and lightest ball bearing block availablePrecision molded acetal sheave running on stainless steel ball bearings provide high performance & low frictionSingle loop head blocks include an O-ring to separate running line from head lashing or fixingFeatures a flush rivet to minimize cutout and facilitate installation.Featuring a formed single piece housing for maximum strength and minimal rope wear.Applications:Dinghy control linesVangs, cunninghams and tweakersShock cord tensioning systemsMaterials:BB sheaves: UV stabilized acetalBall bearings: Stainless steelCheeks: Grade 316 stainless steel