Give small dogs and cats convenient access with the VEVOR Medium Dog Door for Sliding Glass Doors, featuring an 8.25 in. x 12.25 in. pet opening and an adjustable-height frame designed to fit compatible patio door tracks from approximately 75-7/8 in. to 80-11/16 in. Constructed with a durable aluminum frame, tempered glass window and upgraded metal pet-door cover, this sliding patio door insert features an improved hinge structure for dependable operation and long-lasting use. The lockable design helps restrict pet access when needed, while the included sealing strip helps create a secure fit. Designed for straightforward installation in sliding glass door tracks, this removable pet door is especially convenient when a non-permanent solution is preferred. The package includes the dog door insert, user manual, positioning plates, latch lock assembly, sealing strip, connecting rods and installation hardware.