Filter cartridges feature PES membranes with 5, 10, 30, 50 or 100kDa size exclusion cut-offs Large active membrane area with dual vertical design for fast and efficient processing Centrifuge tubes feature internal supports to securely position the filter cartridge Applications include sample concentration, molecule purification, protein fractionation, buffer exchange, and desalting Cartridge design prevents accidental over-concentration of samples High sample recovery of >90% Graduations on conical tube and filter cartridge are printed in bold, easy-to-read black ink Large white marking area provides excellent contrast for identification Filter cartridges are clearly printed with Molecular Weight Cut Off (MWCO) in daltons Easy to write on flat surface HDPE caps feature integrated polyethylene liners for a leak-proof seal Molded graduations in the conical bottom are ideal for small volume quantification Standard centrifuge tube rotor compatibility Operating temperature range of 0°C – 40°C