5 5⁄8" x 4 3⁄4"
This dimension is the smallest area of the cat door that your cat will have to enter.
2 3⁄4"
Depth of the inside tunnel
6 1⁄2" (W) x 6 3⁄4" (H)
The size of hole required to fit your cat door
8 3⁄8"
A circular hole is required to install the cat door in glass. The optimum hole size is 8 3⁄8", but the cat door can be installed into holes up to 10 1⁄4" in diameter.
8 1⁄4" (W) x 8 1⁄4" (H)
Size of the exterior cat door frame
1 5⁄8"
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Disclaimer: Sure Petcare products are not intended to diagnose, cure, treat or prevent diseases or conditions and does not replace veterinary care.