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×Laboware is presenting the product best in quality, Ideal for Gem Testing All Metal Rugged Construction Prism Optical System Provides reading from 400-750nm Sodium D Line for Scale Alignment Slit for Light Adjustment Focusable Tubes for Scale &a Read More...
Laboware is presenting the product best in quality, Ideal for Gem Testing All Metal Rugged Construction Prism Optical System Provides reading from 400-750nm Sodium D Line for Scale Alignment Slit for Light Adjustment Focusable Tubes for Scale & Spectrum