Non-powered complete roof vents with galvanized bases, white screen and white garnishes replace Ventline vents. Features self-centering metal base with radius corners and interior garnish with 1-1/4" flange. Fits roofs 1-3/4" to 2-3/4". Covers all screw holes around cut-out. Positive-seal weatherstripping is leak resistant and watertight. Interchangeable with existing Ventline products. #31-1825 is a powered (12 volt fan) complete roof vent with all the features of non-powered vents. We offer the best so you worry less with higher quality and better performance that outlast all other brands. We carry all the accessories and hardware needed to make installation easier and more productive.   Also available in the following colors and style:   *311998 - Non-Powered Vent, White *311999 - Non-Powered Vent, Smoke *311823 - Non-Powered Vent, Amber *311824 - Non-Powered Vent, Metal   Made by: Hong's