If you are considering the purchase of a used Ruemelin unit, please contact us.  If you provide the serial number, we can tell you when the unit was built, what features it had when it was new, and most importantly, whether repair parts are still available.  Depending upon the type of unit owner's manuals are available at nominal cost.  Likewise, we can often supply technical assistance on issues such as the choice of a suitable abrasive, compressed air volume and pressure needed for maximum productivity, and ventilation air requirements.