The Vivaspin 6 features twin vertical membranes for unparalleled filtration speeds and 100x plus concentrations. Remaining volume is easy to read off the printed scale on the side of the concentrator and the modified dead stop pocket further simplifies direct pipette recovery of the final concentrate. Broad range of process alternatives for the filtration and concentration of biological samples Disposable ultrafiltration devices concentrate and purify biological samples to concentrations over 100x in a single spin! Concentrators feature twin vertical membranes—increased surface area provides faster filtration Polyethersulfone membrane is excellent for most solutions when recovery is most important.