Features:100%High QualityWhite Nylon PP material Wheel TyreDouble ball bearing swivel headSuperior mechanicalUniversal castersQuiet, Wear-resistingHandiness, Shock absorptionWould not scratch the floorIdeal for various uses and placeSpecifications:Wheel Type : White Nylon, Dual roller bearingMaterial: White Nylon PP Material And SteelLoad bearing: 10kg (each)Dimension Details:Overall Height: 33mmWheel Diameter: 21mm ( approx : 1 inch)Wheel Width: 13mmFixing Plate Size: 38 x 32mmHole Diameter: 5mmInstallment Holes spacing: 30 x 23mmPackage included:4 x Double ball bearing swivel head