Exit Blocks minimise friction in lines passing through the deck or exiting masts and booms. The RF45711 exit block incorporates our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range. 40mm Acetal Sheave, Anodised Aluminium Housing, Requires 2x 6mm (1/4") Fasteners MWL = 400kg dynamic load, 800kg static load Materials: Sheave and Ball Bearings: High compression strength acetal. Housing: Anodised aluminium