advertising billboard 1,material:acrylic,aluminium...... 2,logo:silkscreen printing 2012 advertising billboard SpecificationsROUND acrylic advertising boards outdoor/indoor materia:Aluminium alloy frame,acrylic panel logo:silk screen printedROUND acrylic advertising boards outdoor/indooroutdoor sign,projecting illuminate sign,sign light box,outdoor light box sign,round light box-2sidesled outdoor ...