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. It can be used without modification, simply by removing the butt cap and attaching this extension. It can be installed in the same way as MEZZ extenders. MEZZ extenders can be attached. Also, by attaching a MEZZ bumper, various extensions can be installed. Length: Approximately 1 inch Weight: 26.0g ⚠️The cue and the genuine MEZZ butt cap are not included. If you wish to purchase multiple items I am selling, please leave a comment, and I will discount the shipping cost. This is a handmade item, so please purchase it only if you do not 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 that there may be delays due to work commitments.