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Introducing our classic round profile cowl vents with deck plate. This timeless round shape, coupled with an open throat design, efficiently captures abundant air while sitting high off the deck. Crafted with precision casted durable 316L stainless steel, this vent boasts a mirror-polished finish distinguishing it from the commonly used sheet fabrication design made from 304 stainless steel, which often succumbs to rust in the welds when exposed to harsh marine environments.  Inspired by an antique cast bronze vent originally sand-casted in England during the early days of marine craftsmanship, our vent pays homage to this timeless design. In the 1980s, ABI reimagined this classic with a chromed finish. Leveraging modern investment casting capabilities, our design accurately reproduces the original's round shape and free-flowing curvature, departing from the commonplace use of boring 304 stainless welded tube and bowl designs.Available in sizes ranging from 3" to 5", these cast vents are built to last a lifetime. The interior features a durable white powder-coated finish, customizable to any color of your preference. Complete with a heavy-duty 6-hole deck plate and cap featuring a star-pattern key matching the size of a traditional winch handle (11/16"), this vent is engineered for both convenience and durability. The deck plate, with 12 threads per inch and 6 holes, is an exact size match to the Nirco deck plate from the past. For further information or to place an order over the phone, please don't hesitate to contact us.


*Standard interior color is white; however, custom interior colors are available. Please allow 2 weeks for customization.


Size 3"   

Deck Plate Cut-Out 3-3/8" 

Deck Plate Overall Width 4-7/8"

Opening Dimensions 6-1/2"  

Height 9-1/2" 

Weight 4.2 lbs


Size 4"   

Deck Plate Cut-Out 4-3/8 " 

Deck Plate Overall Width 5-5/8"

Opening Dimensions 8-1/2"  

Height  12-3/8"

Weight 6.2 lbs


Size 5" 

Deck Plate Cut-Out 5-3/8 " 

Deck Plate Overall Width 7-1/4"

Opening Dimensions 10-1/2"  

Height  12-1/2"

Weight 8.2 lbs

Round Cowl Vent with Deck Plate

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