Description Description: Castors with for a wide variety of functions and can be fixed to flight cases, dollies, tool boxes, light machinery, instrument cases, display / exhibition equipment, speakers, cabinets, stands, amps, equipment stands, mobile workstations, electrical enclosures, furniture, trolleys etc. Easy to install and easy to use. Heavy duty steel frame. With silent, non-marking rubber wheels. Suitable for use on all types of flooring of home, shops, schools or hospitals. Specification: Material: Rubber + Steel Wheel Diameter: 1 / 25mm ; Dimensions(L x W x H): approx. 39 x 34 x 35mm ; Mounting Hole Diameter: 4.2mm Wheel Diameter: 1.25 / 32mm ; Dimensions(L x W x H): approx. 38 x 34 x 45mm ; Mounting Hole Diameter: 4.2mm Wheel Diameter: 1.5 / 38mm ; Dimensions(L x W x H): approx. 46 x 36 x 50mm ; Mounting Hole Diameter: 5.2mm Wheel Diameter: 2 / 50mm ; Dimensions(L x W x H): approx. 48 x 36 x 65mm ; Mounting Hole Diameter: 6.5mm Package Includes: 1 Piece Castor(2 Pack) Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !