Constructed of corrosion-resistant ABS plastic with no sharp edges. For 3" I.D. ventilation system with 1345 collector box. Install with #8 screws.
Attwood hull-mounted vents are designed to install by fastening as a complete unit from either inside or outside the hull.
17-7/8 x 3-7/16 x 3/4
Cut out: 16 x 2-1/4
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