The SEC-3 1/8″ Maximum Security Grille is constructed with a 14-gauge steel frame and 1/8″ x 1/2″ blades on 1/2″ centerse supported by 14-gauge vertical bars on 6″ centers. Blades can be fixed at 0º, 15º, and 40º deflection. A 14-gauge sleeve, 1 1/2″ long for floor grilles, is welded to the face plate. Sleeves can be various depths to accomodate wall and ceiling constructions. Factory primed gray or white.