From the Amazon.com Product Description
Proxxon micro mill MF 70 - This small and beautiful unit is ideal - the accurate mill for lab, optician, jewelry, electronic and model building projects. Mill is made with a cast iron base. The vertical column and compound lathe are treated, high quality aluminum. All axes are play-free and have adjustable slides. The headstock, made of die cast aluminum, houses 24 pole balanced special motor and provides stability even at high operating speeds. This stability facilitates the use of the finest cutters.
Here's the link for more info on the Proxxon 37110 Micro Mill