Builders Edge 140056774020 Vent, Heritage Cream The Builders Edge 6" Hooded Vent comes complete with 7 inch aluminum tube (6 inch diameter); Net free area: 25 sq in Mounting blocks are durable, maintenance-free, UV stabilized and constructed with color molded-through so they won't scratch, flake, or fade Our patented Snap-On Trim Ring makes installation easy