Constructed of impact-resistant, injection-molded ABS, this louvered vent is designed to be used in conjunction with a collector box to facilitate air intake and exhaust. Interchangeable with Attwood vent model #1494. Ventilator easily installs with four #8 FH fasteners (not included). Note: Avoid contact with acetone or strong solvents. 17-1/2"L x 2-5/8"W. Requires 15-1/2" cutout.