Features: Fixed angle (30°) titanium rotor Capacity: 20 × 0.5mL Max. Speed/RCF: 70,000rpm/307,052 x g K factor: 30.7 Compatible with: Thermo Scientific™ Sorvall™ MTX 150 Series Micro-Ultracentrifuge, MX Series Floor Model Micro-Ultracentrifuge Recommended for: Suited for multiple micro-sample pelleting and lipoprotein flotation.