Attwood Part 13451 3 Collector Box Collector Box Use with plastic louvered vent, with two 3" I.D. wire supported ventilation hoses. Box fastens to vent with screws or pop rivets, vent then fastens to the deck. Corrosion resistant plastic. Attributes: For = 1495 vent Hole Size = 2-7/16" H x 16-1/4" L Depth = 4" Package Quantity = 1