Shell Vent Stainless Steel with Throat
Stainless Steel Clam Shell Vent with a plastic base and the cowl itself.
The small plastic upright inside the ventilator avoids rain and small splashes going down the vent, but allowing good volumes of airflow.
Has a hose tail concealed underneath that allows connection of 75mm id hose if you ever wish to attach a bilge blower.
Mount it face forward to get air in or aft to get air out.
140mm long x 140mm wide x 55mm high.