Builder's Best 110696 Saf-T-Duct Dryer Outlet Box
Fits all 16" centers 2" x 4" and 2" x 6"
6 prescored true 4" dia knockouts in most common positions
6 starburst knockouts for gas connections and venting
Plastic meets UL standard 94HB tests for flammability
Self-trimming unit 18"W x 24"H
White