"Freedom for your pets and relaxation for you they will no longer need to scratch at the door to be let out. Specifically designed to complement most 2'8"", 2'10"" and 3-ft. paneled doors, it can be installed with an 8"" rise for short pets, or rotated 180 to be installed with a 10-1/2"" rise for tall pets. Outer frame is pre-beaded with a sealant to create a watertight seal, while the inner-frame tunnel design prevents dirt and water damage by protecting the core of the door. Dual flaps offer twice the protection from drafts and weather. Secure with the included snap-on closing panel to control the access of your pet. Fits 1-3/4"" thick doors.Flap opening: 10-1/8""W x 16-3/4""H.Outer-frame: 24-1/2""W x 27-3/4""H."