Mini Vacuum Tube 20mL RT-20 1pc

Model number: RT-20 Material: Tube: Glass (Pyrex(R)), Plug: PTFE (Polytetrafluoroethylene) Capacity: 20mL Body diameter x total length x branch pipe diameter: φ19 x 190 x φ13mm How to use: Place the sample in the tube, and adjust the vacuum by moving the adjustable Teflon valve at the top up and down. Close the valve at the optimum value to seal and react the sample. *Please use in conjunction with hot dry bath.