This is an original extension. The price has been increased due to specification changes. 《The screw part has been changed to aluminum, which significantly increases the strength compared to previous versions.》 This is an extension for MEZZ cues. ※ Some KONLLEN cues may be compatible with the MEZZ extension. It can be used without modification, simply by removing the butt bumper and attaching this extension. It can be attached in the same way as a MEZZ extender. MEZZ extenders can be attached to this extension. You can also attach various extensions by using a MEZZ butt bumper. Length: Approximately 1 inch Weight: 29.3g ⚠️ The cue and genuine MEZZ butt bumper are not included. If you wish to purchase multiple items I have listed, please leave a comment, and I will discount the shipping cost. This is handmade, so please purchase if you are not concerned about minor imperfections. Please feel free to ask if you have any questions. I will try to reply as quickly as possible, but please understand if there is a delay due to work or other circumstances.