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Electron Microscopy Sciences Paterson Globes and Circles Graticle NG1, 19mm

Supplier: Electron Microscopy Sciences 6803119
The graticule consists of a central rectangle, sub-divided into nine smaller rectangles with a number of increasing circles outside the top and bottom horizontal edges. The marked figures are the diameters of the circles in units. 250 units represent the horizontal length of the large rectangle. Rectangle size is 4.5mm x 2.025mm. Circle sizes in microns are 450, 360, 270, 225,180,145, 110, 74, 37, and 18.
Size: 19 mm
Surface: Glass sandwich
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