Check the listing for details. V Groove Caster 4" Sliding Gate Wheels for V Track Rail. Condition: New. Listed at 45.76 USD. The groove wheel caster is suitable for suitable for sliding doors, yard doors, garden gate, garage doors, rolling shutters, inverted tracks, window traction, rail machine parts, industrial equipment, wire rope rails, storage racks, pet enclosures, and more.Specification:Material: Carbon SteelLoading Capacity: 450 KG/ 992 LBSHole Central Distance: 92mm / 3.6 inchHole Diameter: 9 x 12mm / 0.4 x 0.5 inchWheel Diameter: 100mm / 4 inchWheel Width: 20mm / 0.8 inchSlot Size: 8 x 16mm / 0.3 x 0.6 inch (Deepth*Width)Total Size: 130 x 36 x 105mm / 5.1 x 1.4 x 4.1 inch (L*W*H)Packing List: 1 x Groove Wheel CasterAdvantage:The V-type groove wheel caster is crafted from quality galvanized steel, the U-groove wheel is both waterproof and corrosion-resistant, providing sturdy durability.