Wire blocks with an "SP" designation have purpose designed narrow sheaves made of Nylatron®, highly resistant to wear and appropriate for use with wire rope. These are common for halyard, vang, and backstay applications. Exit and sheave boxes allow lines to be led through decks, bulkheads, or spars with minimal friction or chafing.
Single block with 75mm (3") aluminium sheave with brass bearing and swivel shackle head. Suitable for use with wire or rope. Black powder coated 316 stainless steel side plates.
Double block with two 75mm (3") aluminium sheaves, swivel shackle head and black powder coated 316 stainless steel side plates. Suitable for use with wire or rope.
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