Separate and purify chemical compounds from mixtures using this chromatography column. Column comes with a coarse frit to hold the stationary phase in place and prevent it from running out the column. The PTFE plug allows for control over the flow of the mobile phase, easing collection of individual chemical samples. The heavy-duty glass chromatography column is 13 mm × 450 mm with a spherical joint (SJ) size of 35/20.