PAIR (2X) CTS 500K Full Size short, SOLID shaft audio taper pot. 450G Series. 10% tolerance. Shaft and bushing are brass. Comes with nut, lock & dress washer. Threaded bushing is 3/8" tall X 3/8" diameter, shaft is 1/4" in diameter. Use knobs that fasten with a set screw. Note: This part requires a 3/8" mounting hole. Not suitable for use with import products that use metric sizing.