The white plastic vent is domed for a more attractive appearance and greater airflow. Patented hose attachment system holds 4" blower hose with no clamps or fasteners! Domed marine blower vent cover looks great and provides 7.33 square inches of ventilation. Just cut a 4.25" hole, pull the blower hose through, thread it onto the patented clamping fingers, then snap grill in place. No fasteners or hose clamps required for this plastic louvered vent cover.
Overall dimensions: 4.5" diameter, 1.25" long tailpiece.
Replace those old, cracked flat vent grills with stylish, domed vents!