ITEM NAME:2x 3 Inch Round Marine Shutter Vents + 4 Inch Hull Pipe In Description: White plastic vent is domed for a more attractive appearance and greater air flow. Our white base louvered flush hose ventilators are weather resistance and easy to install. Made with injection-molded ABS plastic, these ventilators are durable and designed for straight-through air flow for venting hoses. The louvered design keeps unwanted elements out while allowing air to pass through. Furthermore, drilled for #8 FH screws as well as a low-profile design is easy to mount on your boat. Specification: Material: Injection-molded ABS plastic Color: White 3" inch Dimension(L*W*H): 8.6 x 8.6 x 2.5 cm/3.4 x3.4 x0.98 inch 4" inch Dimension(L*W*H): 13 x 13 x6 cm/5.1 x5.1 x2.36 inch Package Includes: 2 Pieces Plastic Hose Vents Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3. Instruction is not included.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you. SKU: DMO0019327519506253.2 Pieces Plastic Hose Vents. Our white base louvered flush hose ventilators are weather resistance and easy to install. Made with injection-molded ABS plastic. Color: White. Instruction is not included.Due to the difference between different monitors, the picture may not reflect the actual color of the item.