PRICES MAY VARY. Our pull our drawer are designed to be compatible with standard RTA (Ready-to-Assemble) cabinets. Therefore, the dimensions mentioned refer to the internal width of the cabinet. If your cabinet is not an RTA cabinet, please measure the internal frame width of your cabinet instead of the external width. Regarding POT#7 (33''W × 21''D), it means that the box of this pullout drawer is 32 inches wideand 21 inches deep. Installation requires at least 33 inches of space when the slide