... cast acrylic sheet (PMMA sheet) for engraving, sign board, display & other outdoor advertising. Cast acrylic sheet (PMMA sheet) ... for engraving, sign board, display & other outdoor advertising.UNISIGN supplies a commercial grade acrylic ... , both indoor & outdoor* light box* fabricated acrylic lettering* display standSalable specifications:* thickness: 1.00~25.00mm* size: 1. ...