Mill finish aluminum, slant back roof vent, flashing dimensions 16-3/4" x 18-3/4", 9-1/2" opening fits between 16" on center rafters, 50 sequin net free area, 8" x 8" aluminum screen, will ventilate 94 sqft, louvered on 3 sides for maximum air flow, fits 3/12 to 10/12 roof pitches.This product adds a great value. Product is highly durable and very easy to use. This product is manufactured in china.