Camco 42144 Flying Insect Screen - FUR 500<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Screen measures 3-5/8" diameter x 1-5/16" tall</li><li>Fits vent of Atwood Hydroflame Furnaces that do not have access doors， and exhaust vent of Girard Tankless Water Heater</li><li>Protects the furnace from flying insect nests</li><li>Easy to install， includes tool</li><li>Heavy-duty stainless steel mesh cover</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51dG4YJRYLL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41MjLQ6xpXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41VZGyXPPOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41dhHRruJFL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41zPCLS6zbL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61gq9%2BaUUQS.png" noproxy>