Features Spring loaded design: allow gates to open and close freely by automatically adjusting height on uneven ground while eliminating gate sag,convenient to operate. Heavy duty caster: the wheel has a maximum load capacity of 220lbs and can also withstand exposure to chemicals and solvents. Shock absorbtion: easy to move and roll, make opening and closing gate easy,Heavy duty universal mounting plate with 4 holes to easily attach to wooden gates or along horizontal or vertical rails of a tubular farm gate. Made of premium nylon material and metal construction, sturdy and durable,high strength, high cost performance. With a brake, you can hold the gate at anywhere, safe and convenient to use,Stable quality, praised. Specification: Material: Nylon + Metal Weight: Approx.1542g/ 54.4oz Caster Dia.: 75mm/ 3in Load capacity: Max.100kg/ 220lbs Package List: 1 * Gate Wheel Note: Please allow slight error due to manual measurement. Thanks for your understanding. Package List