Magnetic Cat Flap - Petmate Magnetic 4 way lock cat flap. Stop stray cats by using this reliable solution. Your cat wears a small magnet on its collar that allows it to enter the flap. Ideal for all doors. Overall Size 7 5/8in x 9 1/2in (195mm x 242mm) Cut out size 6 5/8in x 8 5/8in (168mm x 219mm)