Large clam shell ventilators provide splash protection for vent holes, wire or cable runs and blower-exhaust hose openings. Corrosion resistant 304 stamped stainless-steel construction. Can be used for cabin ventilation with the addition of a dorade box. Clam shell vents are ideal for applications where a taller vent would foul lines or restrict crew movement. Easy installation, vents are pre-drilled for five #6 RH fasteners (not included).