Black. 20mm. 2 spacers per kit. 5×100. 56 center bore. 12×1.25 stud. If the depth of the wheel spacer is smaller than the length of the standard studs, the wheels used must allow for small cavities in the mounting pad of the wheel. If using wheels without cavities, the standard studs should be shortened so that they do not extend beyond the height of the spacer.