10PCS Quartz Glass Lens JGS2 Diameter 11/12/13/14/15/16/17mm Round Acid Alkali Temperature Resistance Thickness 0.5/1/1.5/2/3mm

10PCS Quartz Glass Lens JGS2 Diameter 11/12/13/14/15/16/17mm Round Acid Alkali Temperature Resistance Thickness 0.5/1/1.5/2/3mm

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