12mL Cartridge w/1g SPE Amide-2, 20/pk Back Catalog number: 4827 Availability: In the manufacturer's stock Price on request - + Recommended 731803 Chromafix C18 (L) 265,35 € 12256023 Mega BE-C18, 5gm 20ml, 20/pk 323,81 € 12256045 Mega Bond Elut-NH2, 500mg 6mL, 30/PK 158,75 €