PET PROTECTION - This pet screen door effectively protects and isolates pets, preventing them from escaping outdoors or venturing into dangerous areas. It's also ideal for quarantining new furry family members. VARIOUS SIZES - The cat flap screen measures 91cm x 214cm, fitting door sizes of 90cm x 210cm. Other sizes are available. Please measure your door before purchasing, including the door frame. REINFORCED MATERIAL - Made from thickened vinyl-coated steel wire, it's tougher and more durable than standard fiberglass and polyester fiber, withstanding cat claws under normal circumstances. GOOD VENTILATION - The mesh screen allows for free air circulation, providing fresh air and reducing summer heat. It also effectively keeps out mosquitoes, flies, and other insects. EASY TO INSTALL - Attach the Velcro to the four sides of the door, peel off the backing, and affix the door to the door frame without tools. Suitable for sliding doors, patio doors, French doors, balcony doors, exterior doors, greenhouse doors, and more.