Ronstan Nylatron Sheave Box – Single Upright Lead Block Big Sale

The Nylatron Sheave Box is a low profile lead block designed for guiding halyards and rig sail controls. It can be mounted inverted for upright leads and is commonly used in dinghy spars. Made from durable materials, it supports various control lines. Its specifications ensure reliable performance in marine applications. Features: External tabs can be formed to fit the spar profile Typically used in dinghy spars for control lines Constructed with Nylatron® sheave Grade 316 stainless steel load housing Lightweight at 30g (1.1oz)