Amicon Ultra-0.5 Centrifugal Filter Unit Ultracel-10 regenerated cellulose membrane, 0.5 mL sample volume | Sigma-Aldrich
EMD MILLIPORE UFC501096 Amicon Ultra Centrifugal Filter Unit with Ultracel- 10 Membrane, Clear, 0.5 mL Volume, 1 sq. cm. Filtration Area, 10.8 mm Diameter x 49.9 mm L: Amazon.com: Industrial & Scientific
Amicon® Ultra-15 Centrifugal Filter Unit Ultracel-10 regenerated cellulose membrane, 15 mL sample volume | Sigma-Aldrich