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 MEZZ extensions. You can use it without modification by simply removing the butt cap 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, you can attach various extensions. Length: Approximately 1.2 inches Weight: 31.9g ⚠️ Cue and genuine MEZZ butt cap are not included. If you are interested in purchasing multiple items I have listed, please leave a comment, and I will discount the shipping cost. This is handmade, so please purchase if you don't mind minor imperfections. Please feel free to ask any questions in the comments. I will try to respond as quickly as possible, but please understand if there is a delay due to work or other circumstances.