This is a deep nut used when the length of the volume pot on archtop guitars, etc., is slightly insufficient, making it impossible to tighten the nut. Simply replacing the nut saves the trouble of replacing the pot. It fits domestic volume pots, etc., with an outer screw diameter of Φ7. Dimensions are H 11mm, thickness 2mm, insertion part Φ9mm, thickness 2mm, total 4mm. Please be sure to check if it fits your guitar before purchasing. Made of stainless steel. Shipping is planned via non-standard mail. The pot in the photo is not included. How about this opportunity? Thank you.