9-3/8 in. x 17-1/2 in. Foundation Vent Kit w/ Trim Ring and Optional Fixed Louvers (Galvanized Screen) #117 Bright WhiteThis foundation vent is both decorative and functional, making it ideal for venting crawl spaces in new construction and remodeling. Its trim ring features an exclusive lock that allows for speedy installation with a variety of siding materials, including fiber cement, wood, vinyl, aluminum, stucco, and hardwood. With a contoured design and a molded in screen, this vent helps prevent blowing rain and bugs from entering, while offering a net free area