The potentiometer has a 25k ohm resistance suitable for an active audio path. Overall Volume Pedal Junior dimensions: 3.5" W x 10" L x2 3/8" H . The main pivot shaft is of centerless ground 1/2' diameter stainless steel, precision seated though nylon bushings at both ends. Tough long lasting Kevlar cable transmits pedal travel to the controls and is attached by stainless steel springs.