3M(TM) Scotchlite(TM) Photoelectric Grade Smooth Surface Sheeting 7590, 6 in x 50 yd, 1 per case Boxed Smooth sealed wide-angle reflective lens; in tape roll form with adhesive and liner. Water tolerant. Used for printed labels and warehouse sortation. Luminance 200X (Expressed as times brighter than a perfectly diffusing white surface).