The Bio Lion XC-4K mini desk-top centrifuge is a fixed-speed centrifuge with a speed of 4,000 rpm. This centrifuge comes with a circular six-place rotor for 1.5mL, 0.5mL, or 1.2mL tubes and a 16-place strip tube rotor to accommodate 0.2mL tubes (tubes sold separately). It has a palm-shaped lid for opening with either left or right hand. The centrifuge stops when the lid opens for increased safety. It accepts 100-240VAC, 50/60Hz input power. This centrifuge is designed for small samples. This benchtop centrifuge is non-refrigerated. Specifications Rotor options Rotor 1: 6-place with 1.5mL, 0.5mL, or 1.2mL tubesRotor 2: 16-place with 0.2mL tubes Fixed speed 4,000 rpm Maximum relative centrifugal force (RCF) 900 x g Power 100-240VAC, 50/60Hz, 25W Weight 5lb. Dimensions 130 x 150 x 170mm (H x W x D) H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. A centrifuge is used to spin fluids of different densities to separate various parts, commonly blood and DNA samples. Centrifuges are composed of the main body or housing and a spinning rotor. Tubes of cellular material suspended in liquid are inserted into the rotor and spun at various speeds to separate components. Centrifuges are used in medical, industrial, and research laboratories, as well as academic and clinical settings. C & A Scientific manufactures and distributes medical and educational products. The company, founded in 1988, is headquartered in Manassas, VA.