The size 3 Barton plain bearing blocks have 45mm (1 3/4 sheave size 3 block range incorporates modern design with stainless steel frames and the latest advanced materials, using 30% fiber glass filled nylon and Acetal sheaves to maximize their strength whilst keeping weight to a minimum. Suitable for use as mainsheet, vangs, lead blocks or wherever a powerful and compact purchase system is required on dinghies, dayboats and lightweight cruisers.SpecificationsDiameter: 10mmBreak load: 800KgMax rolling load: 270kgSheave Diameter: 45mm x 13mmLength: 93mmWeight: 19gDownloadFactsheet .input-wrapper a { text-decoration: none; / Removes underline / background-color: transparent; / Ensures no background color / } .input-wrapper a:hover { text-decoration: underline; / Adds underline on hover / background-color: transparent !important; / Removes grey highlight / }