Powder Funnel with Pressure Compensation

Powder funnel with pressure compensation. With 2 NS 29/32 standard grinding pieces and 1 x 14/23. Worm gear made of ptfe. By turning the worm wheel powders can be easily dosed during a reaction without exposing the reaction to the environment, making it safer and easier to use than manually adding solids during a reaction by means of a normal funnel.