Advantage The unique design can be completely placed on the floor without drilling on the floor and the door, and quick installation. Fix the screws on the wall and flatten the damping device to avoid friction and damage to the sliding door. All you have to; do is adjust the roller to fit the door panels with different thickness Please make sure the size matches your size. the door you want to install before buying. Technical data Colour: black Product size: 9.5 cm x 3.5 cm x 5 cm (long x high x large) Supply field 1 x 1 1 1 1 1 set 2 screws 1 x small wrench to inner hexagon 1 x spanner Comment: 1. To measure manual measurement, please listen to the error of 1 to 2. 3 mm. 2. For some reasons, the correct clearance color may be different from the image shown on the product.