Safe Glow Professional Interiors DKR-01S photoluminescent (glow-in-the-dark), Small Door Knob Ring. Provides an inexpensive and effective way to identify door knob locations in total darkness. Includes pre-applied 3M VHB (very high bond) adhesive backing for easy and permanent installation. Material is high strength cast polyurethane with high loading of photoluminescent compound, center hole is 2-5/8, fits most residential door knobs. Photoluminescent performance: charged by ambient light, glow is highly visible in total darkness for more than 12 hours in total darkness. Measures 3-1/2" width by 4-3/4" height by 3/16" thick; 5 year limited warranty. 1 per package.
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