Benchmark Scientific's R2020-E Roto-Mini is a rotating mixer that provides a wide range of mixing capabilities. Suitable for an array of laboratory applications including re-suspension, protein binding, nucleic acid purification, etc. the mixers include interchangeable tube holders for accommodating all common tube sizes from 0.5 ml to 50 ml. The R2020E has a fixed speed of 24 rpms for consistant mixing. The R2020E has a mains voltage of 230 volts and has a EU plug for European outlets.