Automatic shutters. Universal and adjustable for all types of shutters: aluminum, pvc, wood. It is used on shutters with and without a lower rebate. TECHNICAL SHEET: Material: nylon 6+ elastomer Adjustable thickness +/-15 mm. Adjustable from 40 to 55 mm Screws: galvanized steel with square head interchangeable. Wall hole mm. 10 It is screwed directly to the wall Single pack with gusset Unalterable to UV rays Weight. 80 gr Color: black Anti-vibration, anti-shock, shock absorber spring.