Sizes: Available in four sizes: 80x200 cm, 90x200 cm, 90x210 cm, 100x210 cm. Please measure the door size before purchasing, and remember to include the door frame in the measurements. Reinforced mesh: Environmentally friendly nano-coating, durable and tear-resistant, washable. Ventilation: The mesh door curtain allows free air circulation while keeping out mosquitoes, flies, and other insects. Zipper opening: Two-way zipper both from the inside and outside for easy opening and closing. Easy installation: Attached with strong Velcro, no drilling required. Easy to install and remove without damaging the door frame. Give your pet a warm home Our cat door is of high quality and has excellent features. After continuous design optimization, we have balanced factors such as pet protection, insect repellent, air circulation, and visibility. It prevents your pet from escaping, keeps away annoying insects, and allows you to enjoy a peaceful life - free from pests, while being close to your pet. Suitable for various door types Versatile: This cat door is suitable for doors of various sizes and types, including bedrooms, living rooms, kitchens, hallways, balconies, sliding doors, etc. Due to manual measurement, the product may have an error of 1-3 cm.