... acrylic,aluminium...... 2,logo:silkscreen printing 2012 advertising billboard SpecificationsROUND acrylic advertising boards outdoor/indoor materia:Aluminium alloy frame, ... 2sidesled outdoor signage,light box signage ,advertising signageApplication:Suitable for signboard,advertising exhibition,business center,supermarket etc1.Opal ... install7.Applicable for indoor and outdoor 2012 advertising billboard