Custom used encoder pot for the Allen and Heath SQ6 and SQ7 Series Mixers. these are custom pots therefore are very hard to find they have a clear shaft and hole in center so that the LED's can shine through them. If you have a broken encoder the this is the replacement . Just make sure you look at the pictures and match up your parts with mine. They are used and in good working condition. pulled from working mixers. All sales are final unless there is a problem with item. Please message me with your questions before purchasing.