Sartorius 93IEXS42GB-12--A Sartobind® Lab S Cation Exchange Membrane Absorbers, 0.41ml Bed Volume , 4 Absorbers/Unit - 08-050 | Genesee Scientific Sartorius 93IEXS42GB-12--A Sartobind® Lab S Cation Exchange Membrane Absorbers, 0.41ml Bed Volume , 4 Absorbers/Unit - 08-050 | Genesee Scientific