2011 - 2013 Buick Regal Radio Stereo Control Knob. This is a genuine Buick OEM part, not the cheap aftermarket stuff.  The knob has been thoroughly inspected and is in great shape.  **Please double check these pictures and compare your current knobs to our pictures, Regal came with two different style knobs in the same model years. We offer free shipping on this item as well as a money back guarantee. Please make sure your current knobs match our pictures prior to purchase, thank you. Please contact us with any questions that you may have.