Fill the damper with the hole Φ0.4 x 2.0 inches (10 x 50 mm) (diameter x depth) and use. (Requires a board thickness of 0.6 inch (15 mm) or higher) The damper is installed in the center of the top plate or bottom plate. In order to fully pull out the damper functionality, the top plate and bottom plate are the recommended mounting position. Recommended door width 17.7 - 23.6 inches (450 - 600 mm).