Our line of TB (Terminal Block) potentiometers are manufactured for us by KIE of South Korea and feature a brass shaft for smooth rotation and extended life. Best of all they are a NO SOLDER solution! Volume (MV) and tone (T) are offered in both 250K and 500K with .022uf and .047uf capacitors. Balance (B) and our dual volume (DV) are available only in 500K. All potentiometers include a 2mm screwdriver so they are ready to install.