The Amicon Ultra-0.5 device is supplied with two microcentrifuge tubes. During operation, one tube is used to collect filtrate; the other tube is to recover the concentrated sample. Trade Name: Amicon. Key Applications: Protein Purification, Western Blotting, Protein Extraction. Application Notes: Fixed angle rotor: 14,000 x g for concentration spin; 1,000 x g for reverse spin. Length, cm (in): 4.99 (0.196). Filter Material: Regenerated Cellulose. Centrifugal Application: Protein Concentration and Desalting. Centrifugal Filter Unit Type: Protein Sample Prep. Color Code: Clear. Media Brand Name: Ultracel. Minimum Final Concentrate Volume, ?L: 15. Filter Type: Ultrafiltration. Length, mm: 49.9. NMWL, kDa: 10. Diameter, mm: 10.8. Filter Code: PLGCD. Volume, mL: 0.5. Filtration Area, cm squared: 1. Device Material: Housing: Styrene/butadiene, Cap and Tube: Polypropylene.