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 extension. 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 butt bumper, various extensions can be attached. Length: Approximately 1 inch Weight: 25.5g ⚠️ The cue and the 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 the minor details. If you have any questions, please comment. I will try to respond as quickly as possible, but please understand if my response is delayed due to work or other circumstances.