3mL Cartridge w/500mg Amberlite XAD-7, 50/pk Back Catalog number: 2193 Availability: In the manufacturer's stock Price on request - + Recommended 730075 Chromab. columns SiOH, 6mL, 1000mg 104,50 € 4265 3mL Cartridge w/ 200mg Spe-ed Advanta, 50pk Price on request 730022 Chromab. columns C8, 3mL, 200mg 131,40 €