Branson Green Booster 20khz 900 Series Part No-101-149-051The Branson Green Booster 900 Series (Part No. 101149051) is an aluminum Oring booster designed for 20 kHz Branson ultrasonic weldersspecifically compatible with the 900 2000 2000X series. With a 1: 1 amplitude gain (i. e., unity gain), this booster transmits ultrasonic vibrations unchanged in amplitude, ensuring precision and fidelity in applications where modulation is not desired. The green color code signifies this unity gain per Bransons coding