Cat Mate 303 Wall Liner for Cat Mate 234 & 235

Each individual wall liner adds 2" to the framing range of the pet door Fits Cat Mate model numbers 234 and 235 Creates a waterproof tunnel between the door and the other side of the wall Available in white only, but can be painted if desired Makes the cut-out area appear clean and sleek The 2" Cat Mate Wall Liners for Cat Mate Doors are used to frame out the wall where you plan to install your Cat Mate lockable cat flap. The Cat Mate wall liners create a tunnel within the interior of the wall, so it is necessary to measure the thickness of the wall prior to purchasing them. The Cat Mate doors themselves will frame out 2" right out the box. You will need to purchase wall liners based on the remaining amount of wall thickness after the 2" cat door is accounted for. For example, if your wall is 8" thick, you will need to purchase three wall liners, so 6" of additional liner and 2" of the pet door. If your wall is 7" thick, for example, you will need to purchase three additional wall l