Floor Protection It is wrapped in soft polyurethane material to ensure there are no scratches or marks on the floor and easy to move. Stable Structure Diameter: 50mm. The swivel castor tires are made of sturdy hard rubber, the stable steel construction can transport objects up to 100 kg. (Up to 27 kg per roll) Thanks to the galvanized steel frame, the castors can easily be used both indoors and outdoors. Reinforced Design The L-shaped mounting plate saves space. space and is easy to install. The newly improved five mounting holes fix the guide rail in a horizontal direction and are not easy to deform. The corners are reinforced to make the mounting plate more stable. Wide Range of ApplicationsUsually used in small projects and moving furniture, including dressing tables, boxes, under cabinets, etc. the bed, shoe cabinets, toy chests, cabinets, bookshelves, easels, etc. What You Get2 x swivel castors with brake, 2 x castors without brake Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.