PLEASE Confirm the size of this luggage wheel on our before purchasing!! [Upgraded accessories] The material is environmentally friendly PU material no objectional odor, Bearings MATERIAL: Made of carbon steel,with wear-resisting and sound off wheel, giving you a quiet and convenient life. Diameter of this luggage wheel is 50mm , Rim Width is 18mm, Center Bearing internal diameter is 6.1mm . A set of 2 Luggage Suitcase Replacement Wheels, integrally molded, more durable and silence. [Easy To Install] The New Wheels Were Easy To Install and Works Great: 1. Use A Hacksaw To Cut Off The Pole Which Connects The Wheels. 2. Put On The New Ones With The Included Accessories. Colour:black Material:Environmentally friendly PU+carbon steel Package Contents: 2 x Wheels 2 x Axles 2 x Axles screws 4 x Washers 2 x Wrenches 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.