OPL conical discs, set of 3 with solvent resistant coating

Item number
Set of 3 25 mm round black solvent resistant coated discs for use with microscope etc.. Can be immersed in normal gemological liquids to aid the examination of a stone or its spectrum whilst in a liquid of simular R.I.; apertures: 3.5 mm + 5.5 mm + 7.0 mm. Made in England.
More Information
shipment-weight, NOT netto weight (kg) 0.050000
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