Chrome Deluxe Roll-out Trays For 21&rdquo Deep Cabinets Base 30 Roll-Out trays are 5 1/2&rdquo Deep including the rails and constructed with 5/8&rdquo Solid wood dovetailed sides with 1 1/2&rdquo Chrome rails on the sides and back, and 3/16&rdquo plywood bottom. They include a notched front and full extension runners with integrated buffers. If you have any questions or want to order by phone please call 212-832-4200