Series 2 35mm Block - Stanchion LeadStanchion LeadDesigned for use on25mm Ø tubes, with a swivelling action with up-down movement allowing for a fair lead on control lines.A strong, lightweight range of blocks for use on dinghies and dayboats or as lead blocks on larger boats.A comprehensive range of multiple sheave options, together with fiddles and cam cleat blocks, allow powerful, lightweight tackles to be achievedPlain bearing blocksBarton plain bearing blocks have a precision moulded Acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads.Length:110mm(4.33")Sheave Size: Single: 35mm x 12mm (1-3/8" x 15/32")Fiddle: 30/45mm x 12mm (1-3/16" /1-3/4 x 15/32")SWL: 370kg (815lbs)Max Rope Diameter: 8mm (5/16")Break Load:740kg (1,630lbs)