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 the previous version.》 This is an extension for MEZZ cues. * Some KONLLEN cues may be compatible with the MEZZ extension, allowing installation. It can be used without modification, simply 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: 27.8g ⚠️ The cue and genuine MEZZ butt rubber are not included. If you wish to purchase multiple items I have listed, please comment, and I will discount the shipping costs. This is a handmade item, so please purchase it 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 my response is delayed due to work or other circumstances.