Only the mixed cutting head does not have the mixed cutting suit. Now you need a focusing lens. The focal length on the detail page is 63.5-101.6mm, while the focal length on the mixed cut package is 63.5mm. How to choose

CO2 Laser Cutting & Engraving Laser Head
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Non-metal is carbon dioxide cutting, metal is fiber cutting, the corresponding focusing lens is 10.6 and 1064; short focal length is used for cutting metal, long focal length is suitable for cutting thick non-metal.