http://tinyurl.com/m5c9uqe
PetSafe Indoor Outdoor Pet Cat Kitten 4 Way Locking Safe Flap Door Tunnel
Overall Size: 9 1/4" x 9 3/4".
Flap Opening: 6 1/4" x 6 1/2".
Maximum Pet Shoulder Width: 5 7/8".
Product Dimension: 7" D x 13" W x 13" H.
Product Weight: 2 Lbs.