Pristine white, stamped steel, 1-way grille with 1/3" stamped louvers set at a 30° blade pitch, triangle profile. Top projection from wall is 1 inch and bottom projection from wall is 3 1/2 inches from wall. This fits a duct opening of 30 x 6 with an overall outside size of 31 3/4 inches x 6 7/8 inches.