Features: Meterial: znse imported from IIVI company. Diameter: 15mm Focal Length:4" Edge Thinckness: 2.2mm. Tolerance of Thickness : 0.010'' Edge thickness variation (ETV): <= 0.002'' Aperture: 90% of the Diameter Face accuracy (radial deviation / irregularity) at 0.63um :<= 0.20% AR Coating Reflectivity Per surface at 10.6 microns :<= 0.20% Work with 30W- 200W CO2 Laser Engraver Cutter. Packages: 1x HQ CVD znse lens Shipping Times: Standard shipping 7-12 working days from China to USA by USPS Expedited Shipping 4-5 wroking days from China to USA by DHL, Fedex or UPS.
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