48mm-V lun+Nut–2pcs Ball Bearings: Each pulley has bearings made of bearing steel. This allows the pulley to rotate more easily and quietly. At the same time, it can also effectively reduce the heat generation of the rope High-Quality Materials: The pulleys are made of stainless steel, and the ball bearings are made of high hardness bearing steel. It is completely rust resistant indoors Easy Maintenance: Pulleys are secured by self-locking nuts for anti-loosening capability and easy removal of pulleys Pulley diameter 1.88inch/48mm; Maximum Loading Capacity: 500 kg/1100 lb; Fit for: 3-10 mm(0.12-0.39 inch) Wire and Ropes Number of Product: 2 Pcs Pulley