Description Aluminum pulley with single wheel, mobile side plates and high efficiency ball bearing.Equipped with two attachment points for use in complex lifting systems. For ropes up to 12mm diameter. Tensile strength 20kN.Light and compact, the smart pulley is easy to carry and takes up almost no space in your rack. Mounted with ball bearing which is famous for its mechanical advantage of smooth and fast rotation.High quality-manufactured pulley who combines both utility and beauty.