Bring your pet with you on your next adventure. Inspired by RV owners with pets, the Screen Defender Entry Door Screen Protector by Lippert Components is a black powder-coated aluminum screen that helps ensure your pet can't damage or break through your existing LCI entry screen door. Available in four sizes, the Screen Defender is designed to be compatible exclusively with our full line of entry doors made for travel trailers and fifth wheel campers, as well as for motorized doors on motorhomes. And installation couldn’t be easier. The Screen Defender fits and locks into existing channels on your LCI screen door. Get peace of mind and get back to camping. How to Measure: To find the right size, simply measure from the inside of your entry door from edge frame to edge frame, and round up to the nearest even number, e.g., 24", 26", 28" or 30". This number will correspond to the correct Screen Defender size to purchase.