KIMAX one-piece sealed unit with a TS outer joint at the upper end and a TS inner joint at the lower end. Drip tip is provided at the lower end. Inner tube has a single ring of indentations near the exit end to support packing material. Supplied with a jacket so the column may also be used as a condenser. Hose connections accept 5/16 inch I.D. flexible tubing. Inner tube I.D. is 13.5 mm.