<p><span style="color: #ffffff;">We offer two versions of mini-hoppers: standard and Infini Hopper. With the standard mini-hopper, the abrasive flow rate is changed manually by using a slide.  With the Infini Hopper, the flow rate can be changed by pressing a button on the front of the mini-hopper. There are 9 pre-set flow rates. There is also a setting for low-pressure, so when the pump goes into low pressure (piercing glass and other fragile materials), the abrasive flow rate will also be reduced.</span></p>