Product Name: Optics/Optical K9 Window Box /Prism Customized: Customized Shape: Flat Type: Flat Diameter: 2-120mm Diameter Tolerance: +0/-0.05 Thickness Tolerance: +/-0.05mm Surface Quality: 10-5 Surface Flatness: Lamda/4 Centration: <=3 Arc Min. Clear Aperture: >90% of Diameter Transport Package: Carton /Blister Box Origin: China HS Code: 9001909090 Product Description WindowsMaterialSapphire/Bk7/MgF2/CaF2/Si/Ge/Fused SilicaWavefront Distortionλ/10@632.8nmSurface Quality20/10Parallelism≤5 arc sec.Diameter Tolerance+0.0/-0.05mmThickness Tolerance±0.05mmClear Aperture>90% of diameterChamferProtectiveCoatingUncoated, or AR coatingOur company was founded by a group of dedicated experts who have been in optical business for more than 20 years. We, here at JIUYI Optics specialize in the manufacturing of laser level optical components for Device manufacturer and Research Institute around the world.As an ISO registered company, JIUYI Optics has consistently focused on increasing the level of design and manufacture on lens, windows, prisms, mirrors, optical filters, beamsplitters, and coatings, especially for spherical lens. Also, we own perfect CCTV lens assembly under the supports of the class 100,000 dust-free assembly workshop. Furthermore, OEM business is accepted.Our goal is satisfy our customers with superior quality, fast and reliable delivery, competitive price so that each customer can feel confident in using our parts in their applications. These features are what sets JIUYI apart from other optical manufacturers, and that is why our customers reply on JIUYI Optics as their long- term optics partner.FACTORYOUR PRODUCTSWORKSHOPINSPECTIONCOATINGCELogisticsFAQ:Question: Is it possible to provide customized lenses?Yes, it is. Just please send us the drawings or detailed requirements for evaluation.Question: Do you offer some samples for free?Yes, we do if we have stock.Question: What is your delivery time?2-3 weeks for standard order.Question: What is the terms of payment?T/T is advised, and Net 15 days is accepted for stable orders.Question: How do you dispatch the parcels?UPS, TNT, Fedex, and EMS are the transport companies what we have been cooperating for many years, or please provide customer's appointed forwarder.