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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. 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 make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 65 hours Hope you have a pleasant shopping experience!