Detection film calibration plate for microscope correction ruler and optical micrometer 1.The measurement category is comprehensive and intuitive and has high precision.<br> 2.This business card size, easy to carry and use dexterity.<br> Name:special micrometer calibration ruler for microscope<br> Thickness:0.10mm<br> Measurement range:<br> 100-1000 Micrometres in diameter<br> line width 0.03mm-0.2mm<br> :<br> Mechanical/electronic industry ratio to component size, position deviation.<br> Inspection of foreign bodies and scratches on the surface of electronic products.<br> The the surface wire, the printing position and the size of the electronic product are inspected<br> Type:B:Pure English Calibration Ruler<br> Colour:Transparent<br> Material:plastic<br> Size:75X45mm<br> Package Contents:<br> 1 * Microscope correction ruler<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.