[Upgraded accessories] The material is environmentally friendly PU material, and the axles are and shorter to match sizes. [Wheels Size] Diameter Is 50mm/1.97inch, Wheel Width Is 13mm/0.51inch, Center Internal Diameter Is 6mm/0.24inch. [Rotating Flexible] The Luggage Suitcase Wheels Simple Set-up and Easy Maneuvering, Not Easy To Be Wear and Tear, Rotating Flexible, Quietness, Load-, Heavy Duty Casters Wheels Rotate , Replacements for Luggage Case Wheels. [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. color:Black+silver Material:PU Package Contents: 2 x Luggage Wheels Replacement 2 x axles and screws 2 x wrench 4 x Gasket 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.