Before order, please check the diameter and length of the laser tube to ensure the laser tube can be installed into the machine as a replacement.Each laser tube has been tested and we will provide a safe packaging for them.If you have any questions after you received laser tube, please let us know in time.We will provide standard processing procedures to solve your problems efficiently.We provide free replacement as the broken or tube fault(during maintenance period),except man-made damage.Normally, the low power laser tube is suitable for engraving as the small laser bean diameter.If used for
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