Top fitting can be moved to compensate for changes in bed height from 1 to 6 in. below thread. Loosen bushing to slide end-fitting up and down. End-fitting is all PTFE with a glass disc, porosity 25 to 50 μm. Bottom of column is a #11 Ace-Thred bottom end-fitting. Top fitting has a connection for 2 mm I.D. PTFE tubing and bottom fitting has a 1/4 -28 tap for connecting small bore tubing.
Note: 10 mm column is same diameter top to bottom.