Search  for anything...
Hgnova

Hgnova 15 Pcs Fiber Laser Protective Lens D27.9x4.1mm 0-4KW Laser Optical Protection Lens for Raytools Fiber Laser Cutting Head Spare Parts

  • Based on 3 reviews
Condition: New
Checking for the best price...
$28.49 Why this price?

Buy Now, Pay Later

As low as $7 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 8 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Aug 22
Order within 11 hours and 59 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Size: D27.9-T4.1


Features

  • Diameter: 27.9mm/1.1"; Thickness: 4.1mm/0.16". Features a high light transmission rate of 99.5%, enabling efficient transmission of laser energy and ensuring the continuity and stability of the cutting process, improving cutting quality and production efficiency
  • Superior Material: Crafted from imported quartz crystal material, boasting high temperature and corrosion resistance along with a high laser damage threshold. This effectively protects the precision optical components inside the cutting head, while offering exceptional thermal stability, shock resistance, and a long service life in continuous industrial operation
  • Dual-Sided Anti-Reflection Coating: Specially coated on both surfaces with a high-damage-threshold film to minimize reflection losses and resist adhesion from cutting process spatter/debris
  • Enhanced Safety Design: Features a 45 beveled edge that is shatter-resistant and less prone to chipping or cracking. This robust design effectively blocks contaminants such as splashes and dust, significantly improving workplace safety and helping to prevent harm to equipment or operators
  • Convenient 15-Pack: Includes 15 premium protective lenses. Each lens is individually wrapped in anti-scratch packaging to prevent damage and ensure cleanliness, providing ready-to-use spares that minimize costly machine downtime

Manufacturer: ‎Hgnova


Part Number: ‎D27.9--T4.1


Item Weight: ‎5.3 ounces


Product Dimensions: ‎3.15 x 2.36 x 0.39 inches


Item model number: ‎D27.9--T4.1


Size: ‎D27.9-T4.1


Color: ‎white


Item Package Quantity: ‎1


Included Components: ‎laser protective lens


Date First Available: August 31, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Aug 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Look great. Work great. Cheap insurance for your Laser welder.
Size: D27.9-T4.1
Review Image by Keith Hanson
Review Image by Keith Hanson
For just a little over a buck or 2 a piece, these are a great value! And cheap insurance for your welder and prevent downtime. Outside of contamination, which these obviously protect from, having a good supply of these will prevent downtime. As you may know, if your cover gas flow is too low to cool this protecting window, you burn it. We are all cheap with cover gas, unless using compressed air, it's a cost, and no one want to run out of nitrogen or argon. Having a good supply of these on hand, will save you. They have that clingy plastic on them to protect em. I cleaned the first one I tried with alcohol, but it is unnecessary unless you touch it without a glove. Pay attention to diameter when ordering... ... show more
Reviewed in the United States on August 14, 2025 by Keith Hanson
    • Good laser protection windows! Very fair price!
Size: D27.9-T4.1
Review Image by Eric Flynn
Review Image by Eric Flynn
Just as described! They are individually packaged in metallized pouches, with the typical protective film wrapping the windows. I only opened one to replace the one in our BM110 head. It is very clear, with no inclusions. Clean as well! You should clean them before installing anyway, but receiving them in ideally clean condition is nice, but not always the case. These are inexpensive protection windows after all! The dimensions are accurate and fit our BM110 head perfectly! Good value, and nice they are now available on Amazon in the states! Will buy again! ... show more
Reviewed in the United States on August 6, 2025 by Eric Flynn

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...