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MCWlaser Protective Windows USA CVD ZnSe

MCWlaser Protective Windows USA CVD ZnSe


Regular price $19.90 USD
Regular price $29.90 USD Sale price $19.90 USD
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  • Shipping within 1-2 business days.
  • By Expedited Shipping (by DHL/Fedex/UPS/DPD).
  • Within 5-7 days delivery.
  • MCWlaser Official Quality Inspection (100% brand new original authentic).
  • Secure payments; Lifetime Tech Support (Specialists).
  • Support Shipping Worldwide, US and EU stock.
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1. ZnSe Protective Windows
Choose high-quality imported crystal materials, which can withstand high-power lasers.
2.The double-sided coating is firm, wipe-resistant, not easy to fall off, and has a long service life
3. High-precision processing,.frst use an excellent substrate, through cutting. polishing, coating, and other processes to form a total
4. High optical performance, high transmittance above 99.5%.
5. replacement DIY part for Co2 laser engraving, cutting & marking machine & CO2 laser head



. Material: Znse
. Wavelength:10.6um
. Shape Tolerance:+0.00/-0.1mm. Thickness Tolerance:士0.2mm.
. Finish:20-10
. Effective Aperture: > 90%. Eccentric: <3'
. Inverted: <0.2x45°
. Coating:10.6um Double-sided anti-reflection


Material Diameter Thickness Coating
CVD ZnSe 12.7 2.5 AR/AR10.6um
PVD ZnSe 19.05 2 AR/AR 10.6um
CVD ZnSe 20 2 AR/AR10.6um
CVD ZnSe 20 3 AR/AR 10.6um
CVD ZnSe 25 3 AR/AR10.6um
CVD ZnSe 38.1 3 AR/AR 10.6um

Note: Thickness Tolerance: ±0.2mm



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Customer Reviews

Based on 8 reviews

Exactly what I needed to replace the mirrors in my laser

Andre Rocha

Works great!!! Great quality arrived quickly as I needed this to complete a job. I would highly recommend this lens!

ibrahim malave

I purchased this lens to upgrade the stock lens on my K40. After doing a ramp test and setting the z-bed to the proper focal length, the difference is noticeable.

I was able to produce a beam of about .3mm even with the stock lens, and the Cloudray lens hit that mark as well. What improved greatly, though, was the consistency of beam width and cutting depth across the entire work area.

I can now use the entire workpiece in one run as I no longer experience blurry lines or insufficient cuts in the areas farthest from the home position. I've had a lot less frustration and wasted material since installing this lens.

In my opinion this is definitely a worthwhile purchase!

Ian Webb

These were the perfect upgrade to my stock K40 co2 laser. Received the product when stated by seller and in the condition it was advertised. Will buy from again.

John Rallo

If you have a K40(Chinese) laser cutter and happen to crack your focal lens, that's a good and quick replacement. The quality is the same as the original lens that came out of the box.

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What about the shipping method and time?

By Expedited Shipping (by DHL/Fedex/UPS/DPD), door-to-door service.
1. General products,
CN Warehouse: 5-9 Business Days
UAS Warehouse: 3-5 Business Days
EU Warehouse:5-7 Business Days

2. Customized products (Only Support Shippment From China Warehouse)
The average period of production: 5-6 Business Days
Shipping: 5-9 Business Days
(Notification: Customs clearance inspections may cause delays of 2-3 days in logistics)1. General products

By Sea or Air to sea or airport (door-to-door service is optional)
It is for larger cargo.
The delivery time depends on the detailed shipping address, please check the exact time and cost with us.

What about the Customs Duty and VAT or Tax?

1.If your order was shipped from China,the pice doesn't include the import tariff duty, tax, or VAT.
The tariff duty, tax or VAT depend on local law and policy in difference country. The buyer needs to cover the cost.
2.If your order was shipped locally, such as from US ,AU or Europe,the price includes the duty,tax or VAT. The buyer don't need to pay customs duty, tax or VAT.
3 .Part of products in EU and US support PICK UP ON SITE Please check with us about the detail if you need.

If you can provide the invoice?

Yes,if you need the invoice,please contact with

What is your product warranty like?


All customer support services and policies will be only applied to orders on
MCWlaser Amazon Store

If your products are not purchased from our official website or our Amazon Store, but purchased through another third-party platform, we will not be responsible for your order.

Please view our detailed warranty instructions:

If you have any questions, please contact us:
Whatsapp/Wechat: 0086 18121236578

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  • Lifetime Technical Support

    Regardless of whether the product purchased by the customer has reached the warranty period, MCWlaser provides lifelong technical support for all customers who purchase products at

  • Online Support & Expert Support

    For complex technical issues, we provide expert support services (only for customers who purchase products at, and our experts can assist customers to solve problems through remote operation or video calls.

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