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Sorry for non-crystallography related questions. I am looking for a Tangential Flow Filtration device to concentrate large volumes of media (several liters) for protein purification. I am wondering whether I could get some suggestions on my choices. It appears that both Pall and Millipore carry this kind of products. I would really like to get some information on the pros/cons of different models. Any kind feedback will be highly appreciated.

Best regards,

Junyu