Dimensions: roller diameter 75mm, assembly height 110.5mm, Wenderadius 115mm, bike width 32mm, thread options M16 (16mm) Rolling noisy: The wheel is made of rubber, art by a special process, highly elastic, quiet and can effectively protect the soil Flexible safe: anti-steel wrel type Turntable, can prevent leakage, and 360-degree rotation, flexible steering, double brake design, stop running at the same time can also stop the direction of rotation, to operate more securely Detail Design: Roles with dust and dust cover, effectively block dust and prevent winding, holder thickness is 2.5 mm, built -in new bearings, wear strong loads, each 4 inch rolls can wear 250kg Applications: The roles are widespread in houses, offices, hospitals, camps, schools, exhibition stands, small and medium -sized material transport, heavy devices, cars and factories. They are Perfect for heavy furniture and devices Colour:As Shown Material:Metal Package Contents: 4 x wheels Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 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 65 hours.