... acrylic,aluminium...... 2,logo:silkscreen printing outdoor billboard advertising SpecificationsROUND acrylic advertising boards outdoor/indoor materia:Aluminium alloy frame,acrylic panel ... illuminate sign,sign light box,outdoor light box sign,round light box-2sidesled outdoor signage,light box signage ,advertising ... span6.Easy to install7.Applicable for indoor and outdoor outdoor billboard advertising