Insects are clever infiltrators of private space and perhaps worse in an RV than anywhere else, which is why the ABN® RV Bug Vent Screen is exactly what you need. This vent is designed and recommended for RV enthusiasts to fend off wasps, mud dauber nests, birds, and rodents that can wreak havoc in your RV. It is intended for outside RV furnace vents and fits Atwood Hydro Flame furnace vents that do not have access doors. It will fit any 3.6-inch x 1.3-inch opening, so you can replace a vent cover with this equivalent part. Installation is made easy with the included installation tool. Allow fresh air to circulate in your motor home or enclosed trailer while keeping the interior ventilated without letting in creepy crawlers or compromising security. This screen makes recreation easy.