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