Chromatography Column "PSAW" With interchangeable disc but without stopcock 354/01 Effective Length 15 cm., Disc Dia. 10 mm. 354/02 Effective Length 20 cm., Disc Dia. 15 mm. 354/03 Effective Length 30 cm., Disc Dia. 20 mm. 354/04 Effective Length 40 cm., Disc Dia. 20 mm. 354/05 Effective Length 40 cm., Disc Dia. 30 mm. 354/06 Effective Length 50 cm., Disc Dia. 30 mm. 354/07 Effective Length 50 cm., Disc Dia. 40 mm. 354/08 Effective Length 60 cm., Disc Dia. 40 mm. 354/09 Effective Length 75 cm., Disc Dia. 40 mm. (Please mention porosity of disc required in column)