This is an original extension. The price has increased due to specification changes. 《The screw part has been changed to aluminum, significantly increasing the strength compared to previous models.》 This is an extension for MEZZ cues. * MEZZ extensions may be compatible with some KONLLEN cues. It can be used without modification, simply by removing the butt rubber and attaching this. It can be attached 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 1.3 inches Weight: 31.8g ⚠️ 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 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 respond as quickly as possible, but please understand if my response is delayed due to work or other circumstances.