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 version. It can be used without modification, just by removing the butt bumper 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 butt bumper, various extensions can be attached. Length: Approximately 1 inch Weight: 30.1g ⚠️ 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 a handmade item, so please purchase it 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 if my response is delayed due to work or other circumstances.