The Ventline Exterior Wall Vent for RV Range Hood # V2111-55 has an overall width of 11-1/2" and height of 5-1/4". The collar is 1-3/4" deep and is designed to fit a 10-1/2" wide x 3-3/4" tall rough opening. Installation hardware isn't included so you'll want to pick up some screws from your local hardware store and some non-sag sealant # 344270341437-1 to seal around the edge of the vent for a waterproof seal. view full answer...