This is an originally produced extension. This extension can be attached to custom cues and cues from other manufacturers. Simply remove the butt cap and attach it; it can be used without modification. Cognoscenti Jacoby Richard Cudi Lambros Adam etc. It can be attached to any cue that uses a 3/8 16-thread bolt. ⚠️It may not be attachable depending on the bolt length. ⚠️If the bolt length is compatible, it may be attachable to other cues, but this will be at your own risk (confirmed to fit on a Cognoscenti I own). MEZZ extenders can be attached. Also, by attaching the X bumper, you can attach MEZZ extensions. Length: approximately 1.1 inches Weight: 28.6g ⚠️MEZZ genuine butt cap is not included. If you wish to purchase multiple items from my listings, please comment and I will offer a discount for the shipping cost. This is a handmade item, so please only purchase if you are not concerned about minor details. If you have any questions, please leave a comment. I will try to reply as soon as possible, but please forgive me if it is delayed due to work or other circumstances.