The new stepmag Scale-up systems take advantage of the reproducible Sepmag technology in which magnetophoretical conditions anywhere inside the system ring are homogeneous. End-users often wish to work with a wide range of volumes, starting with small tubes and increasing sample size when processes are optimized. With the new stepmag systems end-users can start working with 1.5ml microtubes and scale up to 125ml (stepmag 125) or 250ml (stepmag 250).