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. ※KONLLEN cues may be compatible with MEZZ extensions. It can be used without modification, simply by removing the butt rubber and attaching it. It can be installed in the same way as a MEZZ extender. MEZZ extenders can be attached. Also, by attaching a MEZZ bumper, various extensions can be attached. Length: Approximately 1 inch Weight: 26.1g ⚠️ Cue and genuine MEZZ butt rubber are not included. If you wish to purchase multiple items I am selling, please comment and I will discount the shipping cost. This is a handmade item, so please purchase if you don't mind minor imperfections. Please feel free to comment if you have any questions. I will try to respond as quickly as possible, but please understand that there may be delays due to work commitments.