Dimensions: roller diameter 75mm, assembly height 110.5mm, Wenderadius 115mm, bike width 32mm, thread M16 (16mm) Rolling noisy: The wheel surface 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.