Variety of models support a wide range of tube sizes and capacities – accessories support micro tubes, spin column kits, PCR strips, 15/50 ml conical, pediatric tubes and more. Range of models accommodates microliter tube capacity from 12 to 60 (1.5/2.0 ml). Bio-containment and phenol-resistant lids for safe centrifugation of hazardous samples are optional. Powerful, maintenance free motors achieve high RCF values for best sample results. Reliable and steady temperature control, quick pre-cool and stand-by cooling functions maintain a constant sample temperature.