Product name: a wheelchair ball bearingType: 6001RSMaterial: metal, rubberExternal diameter: 28mm/ 1.1inchInternal diameter: 12 mm/ 0.472inchThickness: 8 mm/ 0.31inchColor: silver, blackWeight: 42 gPackage Content: 6 x Groove Ball Bearing WheelOnly the above package content, other products are not included.Note: Light shooting 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.
