Rev-A-Shelf''s redesigned Two-Tier baskets make other 2-shelf units fail in comparison. With the heavy gage construction, ball-bearing slides on both baskets and multiple mounting points, this is the best two-tier unit available. With 100lb slides on each basket you don''t have to worry about overloading or bending. Multiple sized width and depths are available, so you are sure to find the exact unit that fits your exact cabinet size. Optimize the performance, by adding the optional door mount kit to add a truly one-step opening/closing process (sold separately -5WB-DMKIT).-Included: (1) top basket, (1) bottom basket, (2) u-shape supports, (2) rear mounting brackets and hardware-Slide Type: 100lb Full-Extension Ball-Bearing Slides-Both shelves operates independently-22" depth maximizes your kitchen cabinet-U-shape brackets ensure proper alignment and easier installation-(3) height adjustments on top basket-Designed for a cabinet opening width of 8-1/2" to 12"-Door Mount Brackets: Option that is sold separately (5WB-DMKIT)-Adjustable Frame Height: 16-3/4" to 19"-Construction: Heavy gauge plated metal wire construction-Mounts to cabinet floor, rear and faceframe of cabinet