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<title><![CDATA[EC21 Product Catalogs - bk7 k9]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/bk7_k9--271308/1/bk7 k9.html]]></link><item>
<title><![CDATA[Factory Supply Customized Ar Coating Optical Glass BK7 K9 Right Angle Prism]]></title><link><![CDATA[https://june20210728.en.ec21.com/Factory_Supply_Customized_Ar_Coating--11547959_11548080.html]]></link><description><![CDATA[Product Description
Capacity: Material: Optical glass,Fused silica, Sapphire
Diameter: 1~250mm
Surface Quality: 10-5
Surface Flatness: λ/10 632.8nm
Angular Accuracy: 5&quot;
Coating: AR, HR, Beamsplitter]]></description><pubDate><![CDATA[20230922]]></pubDate></item>
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<title><![CDATA[Optical Glass Quartz, BK7 K9  Porro Prisms for Telescope  AR HR MGF2 Aluminum  Coating]]></title><link><![CDATA[https://kelly258.en.ec21.com/Optical_Glass_Quartz_BK7_K9--10746719_10844519.html]]></link><description><![CDATA[BK7 K9
Size:1mm to 200mm
Surface Quality:20/10
Flatness:1/10lambda
Angle tolerance:5seconds
Coating: AR HR MgF2 Aluminum
Tolerance:+/-0.05mm
sales(at)sunday-optics.com www.sunday-optics.com Bess Zhan]]></description><pubDate><![CDATA[20230922]]></pubDate></item>

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