SNQTV-For the slight difference in the length of the left and right legs: the stackable adjustment design provides an adjustment range of 1mm-5mm.Helps keep your foot/ankle/leg in a more comfortable position during the ride.Greatly improve your pedals, durable material nylon can increase friction and effectively prevent slipping.Easy installation: Comes with 2 size mounting screws, which is convenient and quick, and will not damage the locking pedal.Colour: blackMaterial: nylon + metalPackage Contents:1 * 1mm spacer2 * 2mm spacers6 * screwsOnly the above package content, other products are not included.Note: Light 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.