This versatile white marine cowl vent has a slightly convex grill with angled louvers to help keep rain out. It is easy to install, just drill a 1-3/8" hole and pop it in with a little sealant (not included). The impact vent grabs the edges of the hole, so no fasteners are needed. The 1" opening allows air in to ventilate lockers, under seats, cabinets, anywhere you want to help prevent mildew. Used by boat builders to vent battery compartments, too. Made in the USA!
Outside flange diameter - 1-3/4"
Installation hole - 1-3/8""
Tailpiece - 1/2" (extends into mounting hole)
Whether you need to add ventilation or are replacing an existing grill, this is a very durable, versatile impact ventilator!