Features: Spring loaded design: allow gates to open and close freely by automatically adjusting height on uneven ground while eliminating gate sag. 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. Made of premium nylon material and metal construction, sturdy and durable. With a brake, you can hold the gate at anywhere, safe and convenient to use. 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. Specification: Material: Nylon + Metal Weight: Approx.1542g/ 54.4oz Caster Dia.: 50mm/ 2in Caster Dia.: 75mm/ 3in Caster Dia.:100mm/ 4in Load capacity: Max.100kg/ 220lbs Note: Please allow slight error due to manual measurement. Thanks for your understanding. Packing list Package List: 1 * Gate Wheel