Nora Lighting NX-550-LEDU/RB LED Steel Body NY Approved Exit Sign 8" Red Letters / Black HousingNORA Lighting NX 550 LEDU RB NX 550 LEDU RB Product Description Noras new 20 gauge steel body exit units are suitable for rugged applications and New York City approved. Exit sign utilizing Light Emitting Diode (LED) modules as the primary light source for economy operation NX 550 includes a backup NiCad battery for 90 minutes operation under emergency applications where primary power source has been interrupted or terminated. SPECIFICATIONS : BODY14