Features: 1. Mesh baby door set: 2 telescopic tubes, 4 hooks, and 1 mesh. 110 x 72 centimeters. 2. Multifunctional safety door: The safety door can be used as a baby door for stairs or as a regular pet door for indoor dogs. Create a safe and enclosed environment for your puppy, cat, or baby to play and rest in. 3. No drilling installation: When installing the baby door at the entrance, there is no need to drill holes on the wall, and adhesive hooks can be used to fix it without damaging the wall. Attention: Do not use adhesive hooks on uneven or rough walls or painted walls, as this can reduce the stickiness of the hooks. 4. Widely used and easy to store: Staircase doors can be placed anywhere in the house, such as doorways, between walls, stairs, bedrooms, kitchens, restaurants, and even on the road outside. When someone needs to pass, it is also easy to retract. Lightweight and easy to carry. When not in use, you can easily fold it up and place it anywhere you want, and it also takes up very little space. 5. High quality and durability: Our safety doors are made of thick cloth and stainless steel telescopic rods, which have strong anti bite properties and are not easy to break. The dog door on the staircase is designed to withstand the claws of pets and can also withstand pet abuse. Note: Not recommended for mischievous and destructive dogs, or cats with strong jumping ability