Powerful magnets and motor give stirring speeds up to 2000rpm and is capable of mixing large volumes (up to 15L *). The compact shape takes up less bench space and makes storage easier. Model UC151 has a glass ceramic top which has excellent chemical resistance. The surface is also very easy to clean. The white surface ensures good visibility of colour changed during titrations for example. Model US151 has a robust stainless steel top plate font-size:10pt">and unlike aluminium, doesn't produce eddy currents like aluminium and so ensures a very powerful coupling and stirring action. Both models have an integral fitting for a retort rod and are supplied with 2 x 25mm PTFE coated stir bars. The bottom is shaped to allow a retort base to slide underneath the unit if required, therefore saving further bench space.*Based on water in a 20L glass bottom boiling flask.