Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Wear, mute, load-bearing, double bearing, rotating flexible4.Mainly made of high quality PU rubber, mute and wear resistant.5.Easy to install without complex fix tool.Specifications:Material:PUColor:BlackSize:7.5x2.6cm/2.95x1.02inch(DiaxT)Bearing capacity: 50 kgWidth inside the bracket: the thickness of the new wheel plus bearingOuter bracket width: is the overall length of the screwWeight:120gPackage include:1 x Wheels3 x Washers2 x Axles