High-quality material The cat flap door is made of high-quality PC plastic that is waterproof and weatherproof. The surface is smooth and durable for long service life, and the unit undergoes quality control for reliable performance you can trust. 4 locking options Four locking modes provide flexible control: open inward, open outward, open in both directions, or closed. This helps you manage when your pet can pass and keeps your home secure as needed. Thoughtful design Designed for cats, with a glass-decoration-inspired frame and a transparent flap. The transparent window blends with screens, glass doors and windows to maintain a clean look while letting light through. Size and compatibility Outer dimensions: 11.8 x 11.8 x 1.6 inches. The flap size is 18.5 x 20.5 cm (7.25 x 8 inches). It fits all breeds of cats and some small dogs up to 6 kg (13 lbs). Use scenarios - Install in a glass door or patio door to give your cat independent access while keeping other pets on the desired side. - Use between rooms in homes with interior doors to create pet-access zones as needed. - Suitable for households with multiple pets, allowing you to control when each animal can pass through.