Cat Flaps with Tunnel for Large Cats, Silent Cat Flap with 4-Way Swing Lock for Cats, Small Dogs, Easy to Install and Use Features: Cat door made of ABS material With black cat flap/white cat flap, two colors. With M/L/XL 3 different sizes for all sizes of cats. With outside only, inside only, fully closed, and both inside and outside 4-way switching mode, easily control your pet in and out. The non-direct contact magnet and brush reduce the noise caused by pets going in and out. Transparent door panels allow pets to safely observe their indoor and outdoor environment at all times. Please supervise children under 3 years old when the Cat Flap is in the unlocked position. PLEASE NOTE THE DIMENSIONS: M: External dimensions: Length: 5.5 cm - Height: 22 cm - Width: 19 cm Internal dimensions: Length: 15 cm - Height: 15.5 cm Suitable for cats with a waist circumference smaller than 38 cm. L: External dimensions: Length: 5.5 cm - Height: 27 cm - Width: 23.50 cm Internal dimensions: Length: 18 cm - Height: 19.5 cm Suitable for cats with a waist circumference smaller than 60 cm. XL: External dimensions: Length: 5.5 cm - Height: 29.5 cm - Width: 25 cm Internal dimensions: Length: 19.5 cm - Height: 22 cm Suitable for cats weighing less than 12.5 kg and a waist circumference smaller than 63 cm. Measure your pet: 1. Measure the width of your pet's chest. 2. Measure the length of your pet from the shoulders to the bottom of the chest. What's in the box: 1 x Cat flap 16 x Screws (8 x Long screw, 8 x Short screw) 8 x Screw caps 4 x Double-sided sticker 1 x Installation manual