Column, Chromatography with PTFE Stopcock and Fritted Disc
Lower end of the column has a round bottom.
With reinforced beaded top, coarse porosity fritted disc to support column packing.
All columns are heavy wall designated to increase safety.
These gravity chromatography columns are manufactured from medium wall tubing. 
 

Column, Chromatography with PTFE Stopcock and Fritted Disc