Features:_x000D__x000D_Spring loaded design: allow gates to open and close freely by automatically adjusting height on uneven ground while eliminating gate sag. _x000D_Heavy duty caster: the wheel has a maximum load capacity of 110lbs and can also withstand exposure to chemicals and solvents. _x000D_Shock absorbtion: easy to move and roll, make opening and closing gate easy. _x000D_Made of premium rubber material and metal construction, sturdy and durable. _x000D_Heavy duty universal mounting plate with 2 holes to easily attach to wooden gates or along horizontal or vertical rails of a tubular farm gate. _x000D__x000D_Specification:_x000D_Material: Rubber + Metal_x000D_Weight: Approx.1034g/ 36.5oz_x000D_Caster Dia.: 100mm/ 4in_x000D_Load capacity: Maximun.50kg/ 110lbs_x000D__x000D_Package List:_x000D_1 * Gate Wheel_x000D__x000D_Note:_x000D_Please allow slight error due to manual measurement. Thanks for your understanding. 1Spring loaded design: allow gates to open and close freely by automatically adjusting height on uneven ground while eliminating gate sag. 2Heavy duty caster, the wheel has a maximum load capacity of 110lbs and can also withstand exposure to chemicals and solvents. 3Shock absorbtion, easy to move and roll, make opening and closing gate easy. 4Made of premium rubber material and metal construction, sturdy and durable. 5Heavy duty universal mounting plate with 2 holes to easily attach to wooden gates or along horizontal or vertical rails of a tubular farm gate. ?