This PetSafe aluminum white pet door is sized for medium pets weighing 1–40 lbs, with a flap opening of 8.25" wide x 12" high and a pet passage height of 13". Designed specifically for patio and sliding glass doors, the unit features a durable aluminum frame in white finish. Includes the pet door slab and all necessary hardware. Condition is like new and appears to be in original box. A great deal at a fraction of retail cost — supporting Bud's Warehouse mission of second chances in Denver, CO.