Perfect Pet Cat Flap Four Way Locking Cat Door

The Perfect Pet Cat Flap uses unbreakable clear polycarbonate (others use Plexiglas). The opening is larger than usual and there is a 4-way locking mechanism built in. The bright white frames telescope to allow for a self-framing fit between 11/4in and 13/4in which covers all standard interior and exterior doors. Flap dimensions: 6 1/4inx 6 1/4in. Outside fram dimensions: 8 1/4inx 8in.