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 nylon wheels. Suitable for use on all types of flooring of home, shops, workshop, factories, schools or hospitals. Specification: Material: Steel + Nylon Size: 1" / 1.25" / 1.5" / 2" Wheel Diameter: 1" / 25mm ; Plate Size: 39 x 33mm ; Mounting Hole: 4.2mm Wheel Diameter: 1.25" / 32mm ; Plate Size: 39 x 33mm ; Mounting Hole: 4.2mm Wheel Diameter: 1.5" / 38mm ; Plate Size: 46 x 39mm ; Mounting Hole: 5.2mm Wheel Diameter: 2" / 50mm ; Plate Size: 60 x 46mm ; Mounting Hole: 6.5mm Package Includes: 1 Piece Castor (6 Pack) Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !