The 4WCBM Series Waste Containers are the only bottom mount units available with Rev-A-Shelf's patent pending Rev-A-Motion Soft Open-Soft Close slide system. The innovative gas spring assisted Soft-Open allows the unit to open smoothly and the Soft-Close shuts softly, even under the heaviest of loads. Features two 30 quart metallic silver waste containers and built-in door mount brackets. The 4WCBM is easy to install with only five screws and features a beautiful dovetail constructed frame, concealed 150 lb. slides for a clean look.