Car seat gap fillers come in a set of two pieces. Gap fillers are made of a premium synthetic PU leather which is durable and eye catching. These universal gap fillers are designed to fit in the gaps of your 2016, 2017, 2018 Tesla Model X. Gap fillers measure 11.8” x 4.3” x 2” inches we encourage you to make sure this size will work for your gap space so you can stop dropping unwanted items between your seat. Gap seat filler comes in a verity of colors.