【EASY INSTALLATION】: The wire on positive pole and negative pole had been connected in advance,just connect to the wire on the machine and cover with insulating tape will be ok 【APPLICATION】: This co2 laser tube compatible with all the co2 laser engraving and cutting machine that used laser tube as power,but please make sure your machine's installation space,like the diameter and length,all should be a little bigger than laser tube's size 【STRONG HEAT RESISTANCE】：The tube body is made of glass containing high borosilicate, the tube body is hard, not easy to deform, heat resistance is strong, and it is not easy to crack at high temperature,the service life can reach 1500H-2500H under normal use 【STABLE OUTPUT】: Single mode output mode, fine spot, strong penetrating power, no change in long-term use spot mode 【UNIQUE TECHNOLOGY】: With excellent sealed-off technology to divide air and prevent inside gas diffusion,the laser tube will be more stable and efficient.About the installation of laser tube,here is a video for your reference : https://youtu.be/mbwYveQZPZ8., Manufacturer: TEN-HIGH