Features: Capacity: 4 × 7mL (0.03L) Max. Speed/RCF: 50,000rpm/252,721 x g K factor: 76.6 Angle: 180° Compatible with: Thermo Scientific™ Sorvall™ MTX 150 Series Micro-Ultracentrifuge, MX Series Floor Model Micro-Ultracentrifuge Recommended for: Gradient separations of cell organelles, proteins and viruses.