Brand newDiameter(approx.):Rubber:29mm/1.14inchPlastic:31mm/1.22inchInstallation requires tools: a screw driver or Wrench, a thick cloth.To remove your broken piece, you need to use a plier, a thick cloth, and mineral oil or any other oil for lubrication.Colour: blackMaterial: plastic + metalPackage Contents:2 * Black transmission wheels4 * Black translucent transmission wheelsOnly 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.
