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 the previous version.》 This is an extension for MEZZ cues. * Some KONLLEN cues may be compatible with the MEZZ extension, allowing for installation. It can be used without modification, simply by removing the butt cap and attaching this extension. It can be attached in the same way as a MEZZ extender. MEZZ extenders can be installed. Also, by attaching a MEZZ bumper, various extensions can be installed. Length: Approximately 1.3 inches Weight: 33.7g ⚠️ The cue and the genuine MEZZ butt cap are not included. If you wish to purchase multiple items I have listed, please comment, and I will offer a discount on shipping. This is a handmade item, so please purchase if you do not 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 there is a delay due to work or other circumstances.