Wheel diameter: 50 mm. Wheel width: 17 mm. Thread: M10 x 25 mm. Installation height: 67.5 mm. Turning radius: 62.5 mm. Load capacity: 27 kg per castor. Double open-end spanner: 10 x 14 mm. Hex nut: 10 mm. Grub screws: M10 x 20 mm. Wheel body material: TPE rubber. Wheel centre colour: brown. Casing material: chrome-plated sheet steel. About our product: Our product is made of high-quality rubber and is characterised by shock absorption, wear resistance, cold and heat resistance. In addition, the roller with brake can be rotated 360, so you can change and stop the direction as you like. Durable, safe and durable. You can use our rolls with confidence. Areas of use: Perfect for coffee table, shopping trolley, bookcase, plant stand, workbench, shoe cabinet, toy box and other small moving devices and furniture. How to choose the load capacity of the wheel? You can refer to the following formula: Flat Country: 4 x load capacity = 1 x load capacity x 3. e.g. 4 pieces 50 mm load capacity = 27 kg x 3 = 81 kg. Uphill and downhill: 4 x load capacity = 1 x load capacity x 2. e.g. 4 pieces 50 mm load capacity = 27 kg x 2 = 54 kg. Package includes: 1 double open-ended spanner (10 x 14 mm). 4 x 50 mm transport wheels with brake (M10 x 25 mm with thread). 4 hexagonal nuts (10 mm). 4 gold grub screws (M10 x 20 mm). Perfect Customer Service: We believe that our product can meet your most needs in everyday life. If you are not satisfied with the product, please contact us immediately. We will solve the problem within 24 hours and provide you with a satisfied solution. Have fun shopping!