SureFlap Microchip Pet Door Connect, 5.31" L X 6.69" W X 7" H | Petco
SureFlap Tunnelelement für Katzenklappe | Dehner
Amazon.com : SureFlap - Sure Petcare Microchip Cat Flap, White, Scans Pet's ID on Entry, Check Your Cat's Size,Flap Opening is 4 3/4” (H) by 5 5/8” (W) : Pet Doors : Pet Supplies