This is Paasche’s newest Design in our abrasive etching tools. The ER moves the cup from the top to the bottom allowing for a larger 2 ounce cup. This new design also allows for fine control of abrasive flow. Also eliminated are any clogging issues experienced with the gravity feed AEC. Air Eraser Kit can be used anywhere an abrasive is required to delicately erase; such as decorative etching on glass. Can also be used by the professional technician, manufacturer, hobbyist or for dental lab work, erasing color, and removing rust. Airbrush pressure required will be 20-70 PSI. minimum compressor size recommended is 1/3 HP.