Bourns Model PDB182-GTRB Series is a "blend-balance" guitar potentiometer designed for use as a balance control device for two guitar pick-ups, where the volume level of each pick-up can be blended by utilizing a single dual-gang control. * The new Bourns Model PDB182-GTRB Series of blend-balance guitar potentiometers are designed with features often requested by master luthiers such as plain or knurled shaft options, 3/8" diameter brass bushing, 250 k and 500 k standard resistance values, special M and N audio tapers and a center detent. * The unique M and N audio tapers provide volume blending capability to the guitarist and are why this custom guitar potentiometer is sometimes referred to as a "blend-balance pot." * Carbon element, 1/4" Knurled Split Shaft, 3/8" Bushing Width, 3/8" Bushing Length, Center Detent, Tolerance: ±20 %, Power Rating: 0.06 watt, Maximum Operating Voltage: 150 V * Bourns Series Number: PDB182-GTRB