Lot of 4 chromatography columns with stopcocks. Only one of the columns contains a coarse fritted disc. Two columns have a PTFE stopcock and the other two have a glass pyrex stopcock, exactly as pictured.
length of the two smaller columns = 300mm, OD is approx 25mm
length of two kimax columns = 390mm, OD is approx 40mm
Items are used and may contain markings and other signs of regular usage