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 ones.》 This is an extension for MEZZ cues. ※Some KONLLEN cues may be compatible with MEZZ extensions. It can be used without modification, just by removing the butt bumper and attaching it. It can be installed in the same way as MEZZ extenders. MEZZ extenders can be attached. Also, by attaching a MEZZ bumper, various extensions can be attached. Length: Approximately 1 inch Weight: 24.6g ⚠️ Cue and genuine MEZZ butt bumper are not included. If you wish to purchase multiple items I am selling, 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 soon as possible, but please understand if there is a delay due to work or other circumstances.