[Safty Guarantee] CE certification EN12278,CE 1019. ensures its security, zipline pulley you can trust.Adopted Stainless Steel Wheel shell and stainless steel ball bearing, this tandem double pulley is very lightweight and durable, making it portable for your outdoor adventure activities. [Strength] MBS: 25 KN(5511 lb)(2500kg);Dimensions: 4.2inch(10.7cm) * 3.2inch(8.3cm);Material: Stainless Steel. [Large Breaking Strength] Climbing zipline pulley is mounted on ball bearing, features smooth rotation up to 35 m/s.This tandem pulley is sturdy enough to support up to 25kN(5511 lb)(2500kg),so it can guarantee your safety . [Convenient to Carry] Weighs only:0.64 Ib(290 g).As a general pulley for hauling or transporting equipement,holes for easily clipping carabiners, flexible enough for you to set your preferred zipline mode. [Wide Application] This climbing dual pulley could be used indoor and outdoor activities: in hauling, dragging, tensioning system, in rescue, great for back yard zip line setting,swing seats， mountaineering, tyrolean, rescue applications tree climbing, zipline sports etc. [Safty Guarantee] CE certification EN12278,CE 1019. ensures its security, zipline pulley you can trust.Adopted Stainless Steel Wheel shell and stainless steel ball bearing, this tandem double pulley is very lightweight and durable, making it portable for your outdoor adventure activities.