Feature:1. Spring loaded designs allow gates to open and close freely by automatically adjusting height on uneven ground while eliminating gate sag2. The product is a heavy duty caster, the wheel has a maximum load capacity of 75kg3. Spring caster can also withstand exposure to chemicals and solvents, very durable4. This gate wheel is made of premium rubber material and high quality metal construction, sturdy and durable5. Easy to install, heavy duty universal mounting plate with 2 holes to easily attach to wooden gates or along horizontal or vertical rails of a tubular farm gateSpecification:Item Type: Gate WheelMaterial: Aluminum, rubberPurpose: Multifunctional casters, shock absorptionWeight: 75 kg / 165.3 lb(approx.)Caster Size: Approx. 10.2cm / 4inSize: Approx. 280mm / 11in110mm / 4.3in100mm / 3.9in190mm / 7.5in220mm / 8.7in250mm / 9.8inM8 x approx. 95mm / 3.7inThread Length: Approx. 52mm / 2in.Package List:1 x Caster1 x Damping Device3 x Screw3 x Nut3 x Gasket