General Technologies Corp GTC RT6 Reflective Tape for Optical and Laser Tachometers Wide angle reflectivity material 6 strips 8 inches x 0.2 inch (20 cm x 0.5 cm) Self adhesive and high performance adhesive backing Specially made for use with optical and laser tachometers and counters Dimensions are 8.0 inches L x 0.2inch W (200 cm x 5 mm) each strip Improves the detection of the rotating or moving object from a wide range of angles and distances