Designed for cabin or bilge ventilation. Constructed of injection molded polypropylene they are UV resistant. For use with 3? exhaust hose. Installs with four #8 FH fasteners (not included). Vent area 3.04 square inches. A 2-13/16" B 5/8" C 3-11/16" Color White

Price is per unit.Also available in a case of 10. Please call us if interested in case pricing.