7 Mm Graticule Scale Electrically Illuminated 7w, 230v Magnification: 30x Field Of View: 9 Mm Measuring Accuracy: 2-3 microns. For use with bse metal-cum-concrete tester Model : 'IHC' or, any other make Brinell hardness tester. Also useful in tool-rooms, workshops, etc. Model : Mac 30
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