welcome to our shop! feature: Adjustable Stand Stand Fits 50-80mm CO2 Laser Tube Engraving Machine Specification: Condition: Brand new color: gray Material: ABS plastic, rubber and metal Dimensions: Approx. 11.5x6.5 cm (4.61x2.64 inches) (LxW) Height: Approximately 10-16.5 cm (3.94-6.50 inches) What's included: 1 x CO2 laser tube holder Instructions for use: Screw the four screws into the four rectangular holes on the bottom of the pipe holder and fix it on a flat surface. Put in the laser tube and adjust the tube bracket so that the height of the laser tube is appropriate and at an angle of about 45 degrees with the reflector next to the light output end of the laser tube. After the adjustment is completed, tighten all the screws of the pipe rack. Features: The tube diameter is adjustable, suitable for laser tubes with a diameter of 50-80cm, to avoid unusable tube racks; using special plastic, the material does not age, the laser tube is firmly fixed, and the optical path is not easy to deviate; the lifting screw allows for easy height adjustment; simple installation ; Packing list: 1*Adjustable stand support stand Contains only the above package contents and does not include other products. Notice: Please allow slight errors due to manual measurement and different monitors. (Customer satisfaction is our top priority, if you find any product problems after receiving the goods, such as damage or incorrect quantity, please contact us immediately. We will try our best to provide you with satisfactory after-sales service) Thank you for meeting me and I hope this helps. wish you a happy life.