Twin halyard block, sheave 26, SWL 1300 kg. The Twin-halyard block is specially made for a 2 to 1 main halyard. The very small sheave is aluminium made with a Composite Fibre bushing. The body is completely made in High-resistance stainless steel Nitronic 50. 4 sizes for breaking loads from 2600 to 10000 kg, for boats up to 70 ft.