Radio System/Staywell MEDIUM PET DOOR

Aluminum dog door with security panel, white with see through flap. Heavy-gauge steel locking security cover suitable for wooden or metal doors between 3/8" and 2" thick. No. 600US: Small, for cats, chihuahuas, tea cup poodles, size of opening: 7-1/2" H. x 5-1/8" W., overall frame size: 11-3/4" H. x 7-7/8" W., cut out size: 9-5/8" H. x 5-7/8" W., pet shoulder width: 5-1/4" No. 620US: Medium, for terriers, spaniels, beagles, poodles, dachshunds, size of opening: 12-1/2" H. x 8-5/8" W., overall frame size: 15-3/4" H. x 10-7/8" W., cut out size: 13-3/4" H. x 8-7/8" W., pet shoulder width: 8-1/4" No. 640US: Large, for German shepherds, boxers, collies, size of opening: 16-1/2" H. x 11-1/2" W., overall frame size: 19-3/4" H. x 12-3/4" W., rough opening: 17-3/4" H. x 10-7/8" W., pet shoulder width: 10-1/8" No. 660US: Extra large, overall frame size: 27-1/4" H. x 16-3/8" W., cut out size: 25-1/4" H. x 14-3/8" W., pet shoulder width: 13-3/4"