High quality material: cat clips are made from PC plastic that is waterproof and weatherproof. The surface is smooth, durable, and long lasting. Quality control is performed, so you can buy with confidence. Four locking options: the cat flap provides four closing modes inward open, outward open, bidirectional, and closed. This gives you full control over pet access and prevents pets from opening the door themselves, while still letting you choose the level of entry. Thoughtful design: professionally designed for cats with a glass decorative look and a transparent window. The transparent design blends with your screen, door, or window, supporting a clean, integrated appearance on sliding window screens, glass doors, and glass windows. Suitable for most small pets: overall size 11.8 × 11.8 × 1.6 inches; flap size 18.5 × 20.5 cm (7.25 × 8 inches). Fits all breeds of cats and some small dogs up to 6 kg (13 lbs). Use scenarios: - Install on a glass door or screen to give your cat or small dog easy indoor-outdoor access while you control entry and exit. - Keep pets contained indoors at night or while you are away, without leaving the door propped open. - Ideal for homes with glass or screen doors, providing a clean look and reliable flap operation for daily use.