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Replacing the K40 tube (want to make sure I'm getting the right thing/right size) - Lasers - Maker Forums
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Ten-HIGH AC110V Glass Laser Tube 40W CO2 700mm Length, 50mm Dia for Laser Engraving and Cutting Machine : Amazon.in: Industrial & Scientific
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SPT C35 35W CO2 Sealed Laser Tube for Small and K40 Laser Engraving Machine - LightObject | Professional Laser Cutters and Engravers Solutions
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