Baboni Pet Door for Wall, Steel Frame and Telescoping Tunnel, Aluminum Lock, Double Flap Dog Door and Cat Door, Strong and Durable (Pets Up to 40 lb.) -Medium - Frame is White - Flaps are Brown - New in Box

DIMENSION AND TELESCOPING WIDTH: The telescoping tunnel accommodates walls that are 4 3/4 - 7 1/4 in thick. Flap Opening: 8 1/4"W x 12 1/4"H.
Frame: 12 1/4"W x 17 1/8"H. Cutout in wall:9 7/8"W x 13 3/4"H.