BYM Ultrasonics repairs and sells handgun welding units. From 150 watts through 1100 watts. Models available in 20 KHz and 40 KHz. 2000, 900, 800 and 400 Series power supplies with Inline and Pistol Grip hand unit options along with custom built tips and horns. BYM Ultrasonics builds custom Inline hand held units matched to any of the Branson power supplies.