[High-quality materials]Made of premium rubber material and metal construction, sturdy and durable.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. [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. Specification: color: as show Material: Rubber + Metal Weight: Approx.1034g/ 36.5oz Caster Dia.: 100mm/ 4in size: as show Load capacity: Max.100kg/ 220lbs Package List: 1 * Gate Wheel