Feature: 1. Promote Air Circulation: Excellent ventilation effect ensures air circulation and freshness inside the ship, improving the comfort of the ship's cabin. 2. Thoughtful Design: Designed with a convenient knob, turn the side knob to control the opening and closing of the ventilation door, easy to use. 3. Stainless Steel: Made of excellent stainless steel, high precison mirror polished surface, high strength and rust resistance, strong and durable. 4. Applicable Objects: Uniquely shaped vent is mounted in the cabin to ventilate the door, cockpit and cabin, and meet your requirements. 5. Practical Accessory: Air vent gill plate suitable for marine boat, yacht and RV, perfect marine fittings ensure long time reliable use. Specification: Item Type: Cabin Ventilation PlateMaterial: Stainless SteelWith side grip knob to adjust air vent sizeEdge mounting holes are 3.5 mm/0.138 in. diameter for 3 mm bolts or rivetsApplication: Suitable for marine boat, yacht and RV . Package List: 1 x Cabin Ventilation Plate