This is a chain to prevent the mouthpiece from falling off for signal trumpets. It prevents the mouthpiece from falling off 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: ・Although it has the effect of preventing drops, there is a risk that the mouthpiece may hit the instrument and cause scratches or dents, so please insert the mouthpiece firmly into the instrument. ・If strong force is applied repeatedly, the drop prevention effect may decrease. In that case, please tighten it again. ※If you want to purchase multiple items, please comment. Thank you for viewing. #March #Marching #MarchingBand #Parade #FireDepartment #SelfDefenseForce #Marching #MilitaryTrumpet