Vivaspin 6 centrifugal concentrators have been developed to offer increased volume flexibility and performance. Vivaspin® 6 can process 6 ml in either swing bucket or fixed angle rotors accepting standard 15 ml conical bottom test tubes.High retentate recovery <90%.Vertical membrane design for ultra-fast concentration.Safe sample concentration due to dead-stop volume.Convenient concentrate recovery by pipetting.Volume graduation for easy reading/monitoring