To extend this sliding door system, you can use intermediate rails. You can place this set of door stoppers on the rail to ensure that the door stops in the right place to prevent damage to the door and wall. This matte black set consists of 2 pieces for an extra door. In addition, you can order the accompanying accessories such as a set of two suspension rollers, rails and a set of guide and spacer bars separately. In this way, you can also use the sliding door system for double doors, for example. This product is delivered including fixing material.