pot#1 (15''w x 21''d) for rta cabinet b18 roll out tray wood pull out tray drawer box kitchen cabinet organizer, cabinet slide out shelve, pull-out shelf, include side mount sliders & rear mounting brackets elysian how to measure guide measure the overall opening or the distance between the hinges.or if the edge of the door is proturding as the overall opening, this will be the drawer size then measuremnt depth, from the front edge of the face fram to the back of the cabinet or anything that the back of the door running to enclose ✔this pull out cabinet organizer tray multi use basket is perfect for kitchen, bedroom, offices and bathroom storage. ✔the basket slides is full exetnsion ball bearing drawer slide. ✔this kitchen cabinet roll out shelves weight capacity: 100 lb. ✔the slide out cabinet organizer mounting: side mount ✔the pull out drawers for cabinets material: high quality cold-rolled steel and the boxes are constructed with solid wood sides and plywood bottom. ✔simple installation and attractive wood dovetail design is a perfect addition to any cabinet, pantery, vanties, under sink drawer ✔pullout cabinet organizer is good idea for kitchen drawer organizer rollout