The Micro-Tec CCS-2.5 is a 1 inch cross scale with 0.001 inch divisions. 75nm thick bright chrome lines on conductive ultra-flat silicon substrate. Useful for calibration application for US or inch based products. Die size is 3.5x3.5mm. 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.