B Foot Joint for H-Tube Flute ・Brand new, unused ・Finish: Silver plated ・Inner diameter of the main body connection: Approximately 19.9mm ・Confirmed to be compatible with YAMAHA YFL-23 flutes. ・Slight adjustment may be required when replacing with YAMAHA YFL-211/211S flutes. ・Regarding adjustment of the foot joint, if this foot joint is slightly narrower than the body tube, you can adjust it by slightly grinding the inner diameter of the foot joint with a whetstone or sandpaper attached to a power drill. If the foot joint is slightly wider than the body tube, you can adjust it by wrapping copper or aluminum tape around the connection of the body tube. ・Returns are accepted if the size difference with your instrument is too large and it cannot be used. ・In the case of product returns, please note that you will be responsible for the shipping and return shipping costs. Thank you for your understanding.