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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
12mm CVD ZnSe Focal Focus Lens for 40W Laser Engraver CutterCutting Edge Features: HIGH QUALITY CVD ZnSe: OMTech's powerful focus lenses are manufactured from premium zinc selenium via chemical vapor deposition for superior optical properties. HIGH TRANSMITTANCE: Both sides of each lens are covered with strongly antireflective coatings to achieve at least 99. 5% transmittance rate for infrared light at a wavelength of 10. 6 microns. LASTING DURABILITY: Our laser engraver focus lenses' double sided coating
Cutting Edge Features:
- HIGH-QUALITY CVD ZnSe: OMTech's powerful focus lenses are manufactured from premium zinc selenium via chemical vapor deposition for superior optical properties.
- HIGH TRANSMITTANCE: Both sides of each lens are covered with strongly antireflective coatings to achieve at least 99.5% transmittance rate for infrared light at a wavelength of 10.6 microns.
- LASTING DURABILITY: Our laser engraver focus lenses' double-sided coating process also ensures outstanding scratch resistance for longer service life.
- K40 COMPATIBLE: This 12mm laser focus lens fits OMTech 40W CO2 laser engravers. Please check the focal lens diameter in your machine’s manual before purchasing.
- EASY TO USE: The plano-convex shape of OMTech's engraver focal lens lets you install it easily and correctly onto your machine in the proper orientation. Detailed cleaning instructions also help you take proper care of your lens.
Specifications:
- Material: Zinc Selenium
- Color: Yellow
- Diameter: 12mm (0.47")
- Thickness: 2mm (0.08")
- Focal Length: 1" (25.4mm)/ 2" (50.8mm)/ 3" (76.2mm)/ 4" (101.6mm)
- Rec. Wavelength: 10.6 microns (10600 nm)
- Min. Light Transmittance: 99.5%
- Net Weight: 0.2 oz (5g)
Package Includes:
1 x CVD ZnSe Focus Lens
Warranty:
- No need to worry! We offer a 1-year warranty on all focal lenses.
Certifications:
- FDA Compliant
- CE Certification
- ISO9001 Quality Certification
Summary:
It is all smoke and mirrors! As you engrave, debris such as smoke and dust land on your focal lens, building up a layer of residue over time that absorbs laser beam power and can stain the lens permanently. Eventually, this lost power will affect your machine’s precision and throw off your laser settings. To keep your device running at its full potential, we recommend inspecting and cleaning the optics system once a week and replacing the mirrors or focal lens as soon they get damaged.
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 2281 reviews
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Product Reviews
★★★★★ 1
Cracked Tooth
Update: While I originally loved this product and so did my dogs, I feel the need to update this review. The Dura Chew Nylabones are incredibly hard, which is what makes them last so long. However, one of our dogs did crack a tooth recently from chewing on a Dura Chew. Since then, we have been very hesitant to allow any of our dogs to chew on these as other reviews also state that dogs have cracked teeth. We have since thrown out all of the Dura Chews that we had. We are still using the regular Nylabone products (when they aren't made in China), but once those are gone we will not buy any additional products from Nylabone. We have been buying Whimzees for our dogs for the last two years or so and they are a healthy edible alternative. They do not last as long because they are edible, but I have the peace of mind in knowing that my dogs are safe with them. Another healthy alternative would be antlers, which we also give to our dogs and they usually last a long time.
Original review: Another great Nylabone product. I love that dogs can chew on Nylabone products and they can't pull off pieces like products from other brands (Hartz for example). The Dura Chews are especially great for our hard chewers and they last forever! I love all of the dimples on their chews too, they're great for keeping our dogs' teeth clean. The vet is always impressed when they check their teeth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2015
★★★★★ 5
good
Color: Seaweed & Timothy Hay, CornSilk, CornLeaf, Number of Items: 3
really good my cat love it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
★★★★★ 3
Puppy friendly
Color: Reed, Seaweed & Corn Husk, Seaweed & Corn Silk, Number of Items: 3
This is not designed for dogs who are chewers. I gave this to my adult dog thinking she could play with it and be entertained for a little while. She had it ripped up and spread around the room in about 10 seconds. I would maybe recommend this for puppies to have something softer and gentle on their little teeth and gums. It also makes a bot of a mess once it starts coming apart so I suggest using outside or where it can be contained. Little high of a price point for the value I got out of it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 5
natural material toys
Color: All, Number of Items: 12, Color: All, Number of Items: 12
My dog was immediately interested in these. He loves carrying them around and chewing on them. I also like that they’re made from natural materials.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
★★★★★ 4
Start with 6 pack assortment to let the dogs choose their favorite. They are fragile and messy.
Color: Seaweed & Timothy Hay, CornSilk, CornLeaf, Number of Items: 3, Color: Seaweed & Timothy Hay, CornSilk, CornLeaf, Number of Items: 3
They are fragile and messy. I only give them to the husky for about 5 minutes as a calming reward. His favorite is seaweed and Timothy hay. Why because we feed Timothy hay on the farm. His second choice was corn leaf. He looked at me like I was crazy when he mouthed the corn silk ball.
In the future I will just get the seaweed hay balls. The sensory taste and smell calms him down.
The old lab is easier on these balls. More licking and sucking than hard chewing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
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