For all your general benchtop centrifugation, the Clay Adams Dynac III accommodates a wide range of tube sizes, adapters, cushions, rotors, carriers (shields) and reducing spacers. Just let us know what type of tubes (e.g. red caps, vacutainers, SST, HEMOGARD, etc) you're running and we'll do all the homework. The Dynac® III is simple to use but you TECH's already know that.