362 Chromatography Columns "PSAW" Plain with PTFE (Teflon) key stopcock 362/01 Effective Length 20 cm., Outer Dia. 12 mm. 362/02 Effective Length 30 cm., Outer Dia. 15 mm. 362/03 Effective Length 30 cm., Outer Dia. 20 mm. 362/04 Effective Length 50 cm., Outer Dia. 25 mm. 362/05 Effective Length 60 cm., Outer Dia. 30 mm. 362/06 Effective Length 100 cm., Outer Dia. 40 mm. 362/07 Effective Length 100 cm., Outer Dia. 20 mm.