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 absorption: easy to move and make opening and closing gate easy.Made of premium PU material and metal construction, sturdy and durable.Heavy duty universal mounting plate with 6 holes to easily attach to wooden gates or along horizontal or vertical rails of a tubular farm gate.Specification:Material: Polyurethane (PU) + MetalWeight: Approx.1141g/ 40.2ozCaster Dia.: 50mm/ 2inLoad capacity: Max.50kg/ 110bsPackage List:1 * Gate WheelNote:Please allow slight error due to manual measurement. Thanks for your understanding.