A UNIQUE AND STYLE DESIGN: Is your cat square? So why use a boring, square cat flap? The LYNX Indoor Cat Flap boasts a unique cylindrical design, adding a touch of fun that even the most boring cats enjoy! Bring freedom to your cat with this stylish pet door! EASY ACCESS & KEEPS SMELLS OUT: Create a private escape for your cat to the laundry room, pantry, basement, garage, etc. Keep litter box smell out of your dining room and dogs and babies away from cat food. WORRY-FREE INSTALLATION IN UNDER 30 MINUTES: No DIY experience necessary. Follow the instructions in the manual, use the cutting template and your cat will be bounding through this cat flap in no time. Fits hollow & solid doors from 2.5 to 5 cm thick.