Sartorius 93IEXS42BC-12 Sartobind® Lab S Cation Exchange Membrane Absorber, 2.8ml Bed Volume , 1 Absorber/Unit - 08-048 | Genesee Scientific Sartorius 93IEXS42BC-12 Sartobind® Lab S Cation Exchange Membrane Absorber, 2.8ml Bed Volume , 1 Absorber/Unit - 08-048 | Genesee Scientific