Product Description:
Made of Marine grade Nylon, Excellent seawater corrosion resistance and durable, hold up exposed to salt air on boat
Nylon is a lighter and lower cost solution, Strength and service life are exactly the same as 316 stainless steel
Flush Louvered Hose Ventilators are weatherproof, 4 slots are designed for straight-through airflow
Install with simple screws, we included the screws
Size: 3-11/32" (85mm) x 3-11/32" (85mm), Height: 0.63"(16mm). Vent area Dia: 2-3/4"(73mm), Mounting hole to mounting hole: 2.5"(63.5mm)

Packing Included:
2 Pcs Louvered Flush Plastic Thru Vent
8 Pcs Installation Screws