Light alloy double pulley with mobile plates and ball bearings for hosting of heavy loads. For use with ropes up to 16 mm and accommodate up to three carabiners on the upper eyelet and one in the lower eyelet. With bottom becket to use in complex block and tackle systems. 4151411 Rope Diameter 5/8" | 16 mm MBS 6740 lbs | 30 kN Weight 1.08 lbs | 490 g Standards EN12278,UIAA