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 110lbs 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 + MetalWeight: Approx.1542g/ 54.4ozCaster Dia.: 75mm/ 3inLoad capacity: Maximum 50kg/ 110lbsPackage List:1 * Gate WheelNote:Please allow slight error due to manual measurement. Thanks for your understanding..Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.