High-quality upgrade: The screen door has super strong magnetic force, closes automatically in one second without noise and closes tightly. Wide design and sturdy nylon make it stronger bearing capacity; Environmentally friendly and beautiful, durable and wear-resistant, it can be used for several years - mosquito and insect repellent, pet and child friendly, it is ideal for the yard, patio, balcony, etc. Size selection: The size includes the velcro, not the door size. Measurement method: First measure the inner width of the door frame and then add 5 cm above as product width; then measure the inner height and add 4 cm above. Buy a larger size instead of a smaller one, but the final size must not exceed the outer diameter of the door frame, otherwise it cannot be installed. Welcome to contact us Easy to install and remove: No drilling required, quick installation in minutes. The included bracket is used for flat door frames of all materials and nails for uneven wooden door frames. The door curtain is easy to remove and leaves no marks or damage on the door frame. Perfect service: Since the product measurement is manual flat measurement, the size may have an error of 1 to 2 cm, which is normal. If you have any questions, please contact us at any time, we will definitely answer and solve them. Fine mesh blocks the invasion of all pests and protects you and your family at all times. Enlarged magnet, stronger suction power The large magnet is wrapped in silent fabric and closes quickly without noise. 4 cm upper design The upper velcro is widened to 4 cm, more load-bearing. It does not fall off during use. Perfect appearance, solid material Thickened coated edge fabric, super strong velcro and high-quality shiny silk material make the product more durable. The product size includes velcro, and it should be larger than the door size. First measure the width and height of the inner frame, then the width + 5~10CM, the height + 4~10CM. So that the velcro can be mounted on the door frame. The width of the left and right sides of the velcro is 2 cm each, and the width of the upper velcro is 4 cm. Follow the principle: Larger than smaller. But the size must not exceed the outer diameter of the door frame, otherwise the product cannot be glued to the door frame.