Seadog Line
Vent, Clamshell, 5"L x 4-1/2"W x 2"H - Seadog Line
Price: $15.53
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Part # 331335-1
Vent, Clamshell, 7"L x 5-3/4"W x 2-1/4"H - Seadog Line
Price: $26.97
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Part # 331340-1
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Vent, Clamshell, 7-1/2"L x 6-3/4"W x 2-7/8"H - Seadog Line
Price: $28.51
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Part # 331350-1
2nd Day Air for $4.99 More Eligible
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The Seadog Clam Shell Vent offers superior flow of air through the boat’s hull sides for enhanced ventilation. This vent is constructed of stamped 304 stainless steel for strength and corrosion resistance. Its angled design prevents water from getting into the boat.

The Seadog Clam Shell Vent can be installed easily by using the pre-drilled holes. It is available in three different sizes.

  • Stamped 304 stainless steel construction
  • Superior ventilation to boat’s hull sides
  • Prevents entry of water into the boat

Features of Seadog Clam Shell Vent:

  • Available in three sizes
  • Installs easily
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good vent cover
by Kleem from Concord, Massachusetts on June 27, 2013
I bought this to cover my fuel vent to ensure that no water splash/spray gets in. The clamshell sounds big but it is a good size for this purpose. Construction solid and worked for the purpose. It would be nice if they included screws but I just bought some stainless screws from home depot, not a big deal.
(6 of 6 people found this review helpful)
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Is the width measurement from inside to inside or outside to outside?
It is measured from outside to outside.

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