CHARACTERISTICS:Wall-mounted overpressure expulsion/aspiration grille50 mm pitch.CONSTRUCTION:Anodized aluminium frame and blades.UTILIZATION:For wall installation and for air intake or delivery.FIXING:• Fixing by using clips or frontal screws on demand.ACCESSORIES:• Calibration damper made of galvanized steel and fins with opposite movement.• Mounting counterframes made of galvanized steel sheet.• Bird screen.