Made of high quality ABS material, sturdy and durable. Reinforced with screws, our pet screen door is strong enough not to fall apart easily. It will last a long time. Convenient pet screen door: Size: small (outer size: 24*29, inner size: 26*20.5CM). This pet screen door is designed for screens or doors to let your pets in/out. It is so convenient that they can enter inside or outside on their own. Self-closing and lockable: Our dog screen door has a built-in magnet that keeps the door closed automatically when your dog leaves. You can even lock the door to prevent your pet from going out at night or when you're not home. Sturdy and versatile: the supplied screws with nuts are strong enough to fit on this dog door frame and will never fall down easily, and the door can be replaced at any time. It keeps out mosquitoes, flies, insects and filters out dust and debris. Makes your home more airy and reduces pet odours. Easy to install and use: Our dog screen door is easy to install. You can install it yourself. It's also easy for your beloved pet to push open or close. Lightweight flaps that your dog won't feel heavy.