This is an original extension. The price has been increased due to specification changes. 《The screw part has been changed to aluminum, significantly increasing the strength compared to previous versions.》 This is an extension for MEZZ cues. *Some KONLLEN cues can use the MEZZ extension, so it can be attached. It can be used without modification, just by removing the butt rubber and attaching it. It can be attached in the same way as the MEZZ extender. MEZZ extenders can be attached. Also, by attaching a MEZZ bumper, various extensions can be attached. Length: Approximately 1 inch Weight: 29.1g ⚠️Cue and MEZZ genuine butt rubber are not included. If you wish to purchase multiple items I have listed, please comment and I will discount the shipping cost. This is handmade, so please purchase if you don't mind minor imperfections. If you have any questions, please comment. I will try to reply as quickly as possible, but please understand if there is a delay due to work or other circumstances.