Cogent Guard Column Kit with Bidentate C18 Back Catalog number: 40018-HG4 Manufacturer: MicroSolv Technology Corporation Availability: 3 weeks Price on request - + Recommended A2013150X039 Polaris 5 NH2 150 x 3.9mm 788,16 € CP28301 IonoSpher 5 C 250 x 4.6mm 948,39 € CP27831 OmniSpher 5 C18 150 x 4.6mm 846,19 €