Ronstan's Series 20 Special Purpose Utility Blocks are a range of lightweight blocks with high static and dynamic load capacities and versatile head fittings. They feature a self-lubricating Nylatron® sheave suitable for rope and wire, and stainless steel ball bearings to give high performance and low friction. They are ideal for Dinghy control lines and vangs, cunninghams and traveller controls. Exit blocks minimise friction in lines passing through the deck or exiting masts and booms. Supplied with cover plate. Requires 2 x 4mm fixing screws (not supplied).
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