Leisure Coachworks 11" x 11" RV Roof Vent Fan With 12V Manual Riser Reversible Manual Lift with Black Lid

["Leisure Coachworks 11\" x 11\" RV Roof Vent 12V Fan with 1 speed in and 1 speed out and Black Lid. You can easily open and close the hood with a manual riser. Universal RV Roof vent with reversible 12V fan pushes stale air out of and pulls fresh air into your RV, camper, or enclosed trailer","Compatible with a 2\" to 4-1/2\" thick roof, fits standard 11\" x 11\" openings","Simple installation with 2-wire design, White interior trim piece (or garnish)","Use Leisure Coachworks RV roof vent without disturbing other people in the RV, the 10 blade fan is powerful and quiet while saving energy","Hand-operated knob allows you to open and close dome. 1 speed air in and 1 speed air out"]