# Help selecting the correct tube and nozzle

**URL:** <https://forum.cloudray.com/t/help-selecting-the-correct-tube-and-nozzle/485>\
**Category:** Laser Tube\
**Created:** [August 2, 2021, 11:35am UTC](https://forum.cloudray.com/t/help-selecting-the-correct-tube-and-nozzle/485 "2021-08-02T11:35:23Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![IconicLaserEngraving](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.cloudray.com/iconiclaserengraving/32/366_2.png) [@IconicLaserEngraving](https://forum.cloudray.com/u/IconicLaserEngraving)\
**Post date:** [August 2, 2021, 11:35am UTC](https://forum.cloudray.com/t/help-selecting-the-correct-tube-and-nozzle/485/1 "2021-08-02T11:35:24Z")

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![image](https://us1.discourse-cdn.com/flex020/uploads/cloudray/original/1X/9ca8cb23e995740a2f9b44014d972dbdd4c5e966.jpeg)

Good Day

This is my laser head.  
Need to replace with the E-series,

I only want the laser tube and new nozzle. Don’t need the complete set.

Can you please help me to select the correct short nozzle compatible with my old laser head. I need the FL 38.1mm lens to fit D20

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**Author:** ![Technician](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.cloudray.com/technician/32/15_2.png) [@Technician](https://forum.cloudray.com/u/Technician)\
**Post date:** [August 3, 2021, 1:22am UTC](https://forum.cloudray.com/t/help-selecting-the-correct-tube-and-nozzle/485/2 "2021-08-03T01:22:24Z")

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Hello, in order to better solve your problem, I need to know how many watts your old laser head is.what material you are cutting, and what is the thickness of this material, I can recommend one for you.  
In addition, I will attach the purchase link of the FL 38.1mm lens  
[FL38.1](https://www.cloudraylaser.com/collections/co2-laser-lens/products/cloudray-co2-laser-usa-cvd-znse-meniscus-focus-lens?variant=7645039394867)

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**Author:** ![Goodman](https://avatars.discourse-cdn.com/v4/letter/g/838e76/32.png) [@Goodman](https://forum.cloudray.com/u/Goodman)\
**Post date:** [August 3, 2021, 3:25am UTC](https://forum.cloudray.com/t/help-selecting-the-correct-tube-and-nozzle/485/3 "2021-08-03T03:25:33Z")

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What are your requirements for cutting? I also have an E series, I use their NO3, which can be equipped with FL38.1 focusing lens.

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**Author:** ![IconicLaserEngraving](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.cloudray.com/iconiclaserengraving/32/366_2.png) [@IconicLaserEngraving](https://forum.cloudray.com/u/IconicLaserEngraving)\
**Post date:** [August 3, 2021, 4:20am UTC](https://forum.cloudray.com/t/help-selecting-the-correct-tube-and-nozzle/485/4 "2021-08-03T04:20:51Z")

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Hi Good to hear from you  
Thanks for the reply

I just bought the complete head set. My main aim is to engrave on granite stone.

Regards

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<div class="post-metadata">

**Author:** ![IconicLaserEngraving](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.cloudray.com/iconiclaserengraving/32/366_2.png) [@IconicLaserEngraving](https://forum.cloudray.com/u/IconicLaserEngraving)\
**Post date:** [August 3, 2021, 8:05am UTC](https://forum.cloudray.com/t/help-selecting-the-correct-tube-and-nozzle/485/5 "2021-08-03T08:05:49Z")

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Thanks

I already have all 4 type of lenses. I decided to get the complete head set E-series.