Pulleys are removable compatible with easy installation.Compared with other pulleys, pulley wheel support plate is thicker, the wheels are stronger and the bearing capacity is stronger.Stainless steel manufacturing, rust - proof, corrosion - resistant, outdoor use can also prevent pulley corrosion.The thickened steel plate bracket and wheel core can enhance the bearing capacity. A single small pulley can carry 660lb/300kgThere are two carbon steel ball bearings inside the pulley, which can reduce the friction of the wheel. The pulley turns more flexibly and has no noise.Product Name: V Type PulleyInstallation height: 54mm(2.125in)Wheel diameter: 48mm(1.889in)Wheel thickness: 22mm(0.866in)Groove width: 16 mm(0.629in)Groove depth: 7 mm(0.27in)Load: 300 kg (660 Ib)Application:Generally used as a rail wheel Grooved Wheelsize:54 x 22mmMaterial:steelcolour:SilverPackage Contents:4 x V-Type PulleyOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.