This is a pack of 2 Bourns 500K audio-taper potentiometers, perfect for use as volume controls in guitars, cigar box guitars, and more. These pots include a washer and nut for mounting. These are high-quality pots that will last a very long time, and they have a nice firm turning torque, not like those cheap pots that turn very easily. On a guitar, you want a pot with some torque to the turn, so that you don"t drastically change your volume every time the knob gets bumped. See specifications below for more detailed information.Specifications: Taper: Audio; Resistance: 500KOhms; Shaft Type: Knurled; Shaft Length: 20mm; Shaft Diameter: 6mm; Terminal Configuration: Rear; Dimensions: 24 mm Dia. x 11.8 mm L; Element Type: Carbon; Standard Resistance Tolerance: ±20%; Operating Temperature: -10°C to +70°C; Power Rating: 0.25W; Maximum Operating Voltage: 250V; Rotational Noise: 150mV max.; Mechanical Angle: 300°±5°; Rotational Torque: 20 to 200g-cm; Stop Strength: 8kg-cm. min.; Rotational Life: 15,000 cycles min.; Soldering Condition:Manual: 300°C within 3 sec.Wave: 260°C within 3 sec.Applications: Electric guitars; Sound processing equipment; Guitar and sound system amplifiers; Appliances; Various commercial applications