Schlenk-frit
A Schlenk-frit is a laboratory filtration device operating under inert gas conditions (schlenk conditions). It separates air- and water-sensitive suspensions into liquid and solid parts. A Schlenk-frit is made of a glass tube with a ground glass joint at both ends, a fused filter (a porous glass disk) and valves at both sides.[1]
![A schlenk-frit.](http://upload.wikimedia.org/wikipedia/commons/thumb/7/77/Schlenk_frit.svg/40px-Schlenk_frit.svg.png)