Product Description Speed: 0-200 rmp; adjusting range of gum ejection: 0-999.9; adjusting range of gum ejection: 0-400 degrees; minimum gum ejection: 0.0001 ml; applicable material viscosity: less than 10,000 CPS The metal was painted with paint., strong corrosion protection This dispenser drips glue by rotating some cylinders to extrude the tube. There is a pumping air inside the tube to extract glue for dropping glue. Note: The main function of backdraft is to use thinner glue. Opening can effectively prevent the glue from dripping in the process of use, but only a little or a little bit can be opened. Please do not open too much at one breath, which will cause the solenoid valve to burn out because of glue. Designed for wide range of application: cellphone key-press, printing, switch, connectors, computer, digital products, digital camera, MP3, MP4, electronic toys, horn, buzzer, electronic components, integrated circuit, LCD screen, relays, speaker, LED lamp, chassis bonding, optical lens, mechanical components, seal, etc. Attention: One year warranty