You might be wondering, “what the heck is a potentiometer?!” A potentiometer is the part that allows you to variable control the speed/power of your Vitamix blender. If you have found that your blender is not responding very well to you changing the speed/power, then you likely need a new potentiometer. This is a genuine, high-quality OEM part that will easily replace the one that came with your Vitamix. And don’t be scared by the big name! The potentiometer is actually an easy part to replace, and will last a long time. Not only do we offer the part at a very affordable price but shipping is free with Amazon Prime and will ship quickly whether or not you use Prime. If you’re looking for a high-quality replacement part for an affordable price that ships quickly, then this is the part for you!