![Sea-Dog Stainless Steel Butterfly Vent - Center Knob - 5" [331450-1]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/sea-dog-stainless-steel-butterfly-vent-center-knob-5-331450-1.webp)
Description
Stainless Steel Butterfly Vent – Center Knob – 5″
Butterfly Vents promote air flow preventing mold, mildew, and associated odors. Features a center knob that allows for easy adjustment of the opening. Corrosion resistant 304 stainless steel construction. Installs with four 6 RH fasteners (not included).
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
![Sea-Dog Stainless Steel Louvered Vent - Oval - 9-1/8" x 4-5/8" [331405-1]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/sea-dog-stainless-steel-louvered-vent-oval-9-1-8-x-4-5-8-331405-1.webp)
![Sea-Dog Stainless Steel Round Louvered Vent - 4" [331424-1]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/sea-dog-stainless-steel-round-louvered-vent-4-331424-1.webp)
![Attwood Straight Fuel Vent - Black Polypropylene [1607-3]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/attwood-straight-fuel-vent-black-polypropylene-1607-3.webp)
![Sea-Dog Stainless Steel Louvered Vent - 9-1/8" x 4-5/8" [331400-1]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/sea-dog-stainless-steel-louvered-vent-9-1-8-x-4-5-8-331400-1.webp)
![Attwood 90 P-Trap Fuel Tank Vent - Flush Mount - Black w/Stainless Steel Vent Head [1674-6]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/attwood-90-p-trap-fuel-tank-vent-flush-mount-black-w-stainless-steel-vent-head-1.webp)
![Sea-Dog Stainless Steel Louvered Vent - 5" x 4-5/8" [331390-1]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/sea-dog-stainless-steel-louvered-vent-5-x-4-5-8-331390-1.webp)
