The Micro-Tec CCS-1 is a 1mm cross scale with 0.01mm divisions. 75nm thick bright chrome lines on conductive ultra-flat silicon substrate. Die size is 3.5 x 3.5mm. Each calibration standard has the product ID with an unique serial number etched in the standard.Intended for reflected light microscopy, stereo microscopy, digital imaging systems and low magnification SEM applications.