Vivaspin 20 Centrifugal Ultra Filter (1,000,000 MWCO, PES Membrane, 48 per pack): Science Lab Centrifugal Filters: Amazon.com: Industrial & Scientific
Corning® Spin-X® UF 6 mL Centrifugal Concentrator, 30,000 MWCO Membrane, 25/Case | Ultrafiltration Concentrators | Filtration | Cell Culture | Life Sciences United States Business Site | Corning