... ,qucik sample Exit Sign, Cast Aluminum - Single or Double Sided - Self Testing- AC w/Battery Backup Specification:Material: ... Fabrication: Sawing, Deburing, Milling, Drilling, Turning, Tapping, Shearing, Insulation, Platic forming, HydroformingApplication:Aluminum exit signs offer attractive aesthetics ideal ... . Exit Sign, Cast Aluminum - Single or Double Sided - Self Testing- AC w/Battery Backup