3mL Cartridge w/500mg Amberlite XAD-7, 50/pk Back Catalog number: 2193 Availability: In the manufacturer's stock Price on request - + Recommended 730012 Chromab. columns C18 ec, 3mL, 200mg 127,68 € 730073MPS Chromab. columns SiOH, 3mL, 500mg, MPS 202,31 € 2444 60mL Empty Cartidge, 100/pk Price on request