USE FOR: This RV vent cover is meant to replacement that fit 14"x 14" RV roof ceiling attic dome exhausts vent and comes completely assembled, which is easy to install. We understand that it’s quite inconvenient to getting on your RV roof. 14 inch RV vent covers keep RV bathroom vent air fresh, insulated rain leaking, and prevent heat entering inside RV. It suits for Camper, Motorhome, Trailer.