Jacketed, adjustable bed chromatographic Column used for recycling, ascending descending applications. Completely jacketed for better temperature uniformity with single Bushing at each end allowing for quick and easy adjustment of the PTFE plunger. The 25-50 micron porous glass disc gives rapid flow with a minimum of mixing. Pressure to 3.515 kg/cm2 (50 psi) at room temperature or slightly below. PTFE plunger available with PTFE or O-Ring seals, hose connections are for 9.5mm or 3/8 inch tubing.