Ensure a secure, vibration-free speaker mount with the K&M 21441 Ring Lock Adapter Sleeve. Designed to fit stands with a 1.378" tubing diameter, this steel adapter uses a patented expanding mandrel system to create a tight, stable connection between the stand and speaker. Internal plastic splints help isolate the speaker from the metal post, reducing vibration, rattle and unwanted resonance at higher volumes. A sturdy locking screw provides a reliable, positive fit during setup, while the compact 10" length makes it easy to transport between gigs or sessions. Durable and consistent, the K&M 21441 Adapter Sleeve is a practical solution for adapting speaker setups with confidence.