This is a chain to prevent the mouthpiece from falling off for signal trumpets. It prevents the mouthpiece from falling out during marching, etc. Due to popular demand, we have started selling a [5-piece set]. Specifications: ・Color: Gold (chain) ・Overall length: Approximately 12cm ・Chain length: Approximately 10cm ・Inner diameter of the mouthpiece attachment: Approximately 10mm (Maximum inner diameter when pressing the knob: Approximately 12mm) Please note: ・While it helps prevent drops, there is a risk of the mouthpiece hitting the instrument and causing scratches or dents, so please insert the mouthpiece firmly into the instrument. ・The drop prevention effect may decrease if strong force is repeatedly applied. In that case, tighten it again. ※If you want to purchase multiple items, please comment. Thank you for viewing. #March #Marching #MarchingBand #Parade #FireDepartment #FireBrigade #SelfDefenseForce #Marching #MilitaryTrumpet