Features Flexible design:Spring loaded designs make gates to open and close freely by automatically adjusting height on uneven ground while eliminating gate sag. Great material and durable:The spring loader caster is made of premium rubber material and high quality metal construction, sturdy and durable,which can be used for a long time. Large load capacity:The gate wheel is a heavy duty caster,the wheel has a maximum load capacity of 90kg.This spring caster can also withstand exposure to chemicals and solvents, very durable. Widely used:Heavy duty universal mounting plate with 2 holes to easily attach to wooden gates or along horizontal,which is suitable for home,depot. After-sales service:If you have any questions to our gate wheel, please contact customer service. Your satisfaction is our greatest motivation. Specification:  Item Type: Gate WheelMaterial: Aluminum, rubber Purpose: Multifunctional casters, shock absorptionLoad Bearing: 90 kg / 198.4 lb(approx.)Caster Size: Approx. 12.7cm / 5in Size: Approx. 310mm / 12.2in 130mm / 5.1in 125mm / 4.9in 220mm / 8.7in 250mm / 9.8in 280mm / 11in M8 x approx. 95mm / 3.7in Thread Length: Approx. 52mm / 2in Package List:1 x Caster1 x Damping Device3 x Screw3 x Nut3 x Gasket Package List 1 x Caster 1 x Damping Device 3 x Screw 3 x Nut 3 x Gasket