This is for an Original Single (1) Pioneer Centrex KH-5151  Pioneer Centrex KH-5151 + More Selector, Bass, Treble, Rec Level, Knob Part For Receiver.  THIS IS FOR A SINGLE KNOB BUT THERE ARE MORE AVAILABLE AS SHOWN IN PICTURES.  CHANGE QUANTITY AT CHECKOUT IF YOU NEED MORE THAN ONE.  It is in very good condition.  It might have some small marks.   This was removed from a KH5151, but will fit other models.  Please be sure it is right for your needs before purchase.   It measures approx 3/4" wide at the back x a hair over 5/8" wide at the front and approx. 3/4" deep.    Please email any questions.   Combine auctions to save on shipping.  Shipping is free!.  Delivery confirmation is included.  Please Email any questions. See my other auctions for more SX626 knobs, Receiver parts, speakers, stereo parts, electronics, and other collectible items.