The new Levelling System (MUSTANG) is manufactured using first quality PVC and is a high quality product. The Mustang system has many advantages compared to other branded systems on the market such as: Our bases are available in 1,2 & 3mm; Our bases allow adhesive to penetrate providing extra adhesion to the tiles; You only need to buy one base for all thicknesses of tiles from 3-20mm; The Wedges are made of high quality PVC are re-usable and also have a greater surface area to get the best results