Series 30 Utility Ball Bearing Block - Single, Becket, Loop HeadFeatures:Low friction 2-stage ball bearing system provides consistent performance over the full working load range.High static and dynamic load capacity.Light weightVersatile head fittingsProduct Information:Sheaves 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.Can be fitted with a shackle in either of two planes to allow correct alignment of the block.Applications:Primary lead blocks on dinghies and catamaransControl lines on larger yachtsMaterials:U.V. stabilised Acetal sheavesAcetal ball bearingsImpact modified, fibre reinforced and U.V. stabilised Nylon cheeksGrade 316 stainless steel load straps and head fittings