The upper dishrack roller and axel kit comes with two pieces, a wheel and an axle. This kit is made for your dishwasher. Both pieces measure to be roughly one square inch each, they are made entirely of plastic, and are white in color. The purpose of these parts is to allow your dishrack to roll easily on the support rails. This kit is sold individually and contains only one wheel and one axle. Please order the required quantity for your repair. If your dishrack is having trouble rolling in and out you may need replace your rollers and axles.