1. 50W laser tube 2. glass laser tube 3. CO2 tube 4. length: 86cm 5. package: ply-wood case 50watt CO2 laser tube This laser tube is for laser machine TR-5030, TR-5030H, TR-6040 and TR-6040H. Tube with good and steady function, You can also choose 60W tube, 80W tube for usage.