The Yamaha silent brass system for trumpet SB7 is a practice mute designed for trumpets. This unit, made of brass with a matte finish in black, was manufactured in Japan by Yamaha. Weighing 2lb 5 oz., this silent brass system offers a way for musicians to practice quietly without disturbing others. Ideal for trumpet players looking to hone their skills in a discreet setting, this mute from Yamaha is a reliable and high-quality accessory for brass instruments.