CyberTech Reflective Tape for Optical and Laser Non-Contact Digital Photo Tachometers Tach RPM- 10 strips &#10004;Wide angle reflectivity tape, 10 strips, each 8 inches x 0.5 inch (20 cm x 1.2 cm) &#10004;High performance adhesive backing will stick to most surfaces &#10004;Specially made for use with optical and laser tachometers and revolution counters &#10004;specially formulated self adhesive reflective tape for use as a target for optical tachometers &#10004;Its highly reflective surface is designed to retro reflect the light (infrared, laser or visible) emitted by the optical tachometer