3M(TM) Scotchlite(TM) High Gain Reflective Sheeting 7610, 2 in x 50 yd, 2 per carton Exposed reflective lens with adhesive and liner. Highest brightness return in a spherical lens tape and at widest angles. For use in measurement, tracking, security and safety with laser and polarized light. Luminance 900X (Expressed as times brighter than a perfectly diffusing white surface).