Petzl P21 SPE Fixed Cheek Tandem Cable Pulley with two stainless steel sheaves. Colour blue-grey. This pulley is designed for use with Tyrolean traverses on either wire cable up to 12mm max. dia. or textile ropes up to 13mm maximum diameter, & also as a component in hauling systems. Each sheave is fitted with ball bearings & can be used at speeds up to 20m/s. Weight 270g. EN12278. Individually tested. Working load 2.5kN x 4 = 10kN. Breaking strength 6kN x 4 = 24kN. See Manufacturer Instruct