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) 272,30 € 12256012 Mega BE-NH2, 1gm 6ml, 30/pk 211,75 € 730070 Chromab. columns SiOH, 6mL, 500mg 92,35 €