or
SiliaPrep* 96 Well Plate C18 WPD (125 A 37-55 um) 50 mg 2 mL^ SiliaPrep* 96 Well Plate C18 WPD (125 A 37-55 um), For SiliaPrep Reversed-Phases SPE Formats, Catridge volume: 50 mg, Bed weight: 2 mL