American Permalight Inc Photoluminescent Aluminum 'Left' L-Shaped Step Marker p/n 83-60027

THESE PHOTOLUMINESCENT ALUMINUM STEP MARKERS GET INSTALLED ON THE VERY LEFT AND VERY RIGHT OF EACH STEP IN A STAIRCASE TO HIGHLIGHT THE PATH OF ESCAPE. ALWAYS MARK BOTH SIDES OF A STEP REQUIRING ONE LEFT AND ONE RIGHT MARKER. THE MARKERS ABSORB AND STORE ENERGY FROM AMBIENT LIGHT AND ARE IMMEDIATELY VISIBLE IN A SUDDEN BLACK-OUT OR UNDERNEATH SMOKE. THE ALUMINUM STEP MARKERS HAVE A FOAMY ADHESIVE BACKING THAT WELL ATTACHES TO THE STEP SURFACE WHEN PRESS-APPLIED (PREFERABLY WITH A PRESSURE ROLLER). IMPORTANT INSTALL ON WET-CLEANED DUST-FREE DRY SMOOTH STEP SURFACES. NYC-MEA LISTED BY NEW YORK CITY DEPARTMENT OF BUILDINGS.