3mL Cartridge w/500mg Amberlite XAD-7, 50/pk Back Catalog number: 2193 Availability: In the manufacturer's stock Price on request - + Recommended 730073 Chromab. columns SiOH, 3mL, 500mg 130,30 € 4827 12mL Cartridge w/1g SPE Amide-2, 20/pk Price on request 730005.250 Chromab. columns C18, 6mL, 1000mg, BIG 827,10 €