Bug Screen - RV Appliance; Furnace; For Use With Hydroflame 8500 Series With Access Doors; 4-7/8 Inch Length x 4-1/2 Inch Width x 1-1/8 Inch Depth; Wire Mesh Screen; Single; With Mounting Hardware; With English/ French Language Package Features Protects The Furnace From Flying Insect Nests Heavy-Duty Stainless Steel Mesh Cover Fits Hydroflame With Access Door Series Furnace Vents Easy To Install Just Drop In Place And Close Cover Limited 90 Day Warranty Wasps Mud Daubers Birds And Rodents Pose A Serious Threat To The Furnace On Your RV. They Can Enter Through The Furnace Vents And Cause Serious Damage By Building Nests That Interfere With Air Flow. Camco (Model FUR 300) Flying Insect RV Furnace Screen Fits Vent Of Atwood Hydorflame Furnaces That Have Access Door. As Camco Offers Several Furnace Screens Consult Size And Photos To Confirm This Screen Will Fit Your Furnace Vent. This Easy-To-Install Screen Will Help Ensure That Your Furnace Vent Stays Free From Costly Invasion By Unwanted Pests.