Set of 3 (3X) CTS 250K short/split, knurled shaft with nut, lock & dress washer. These are flat-back, short shaft pots (threaded bushing is 3/8" tall X 3/8" diameter). The potentiometer is manufactured by CTS and distributed by Allparts, part # EP 0085. 250K pots are typically used with single coil pickups.
Note: This part is sized for American-made guitars and requires a 3/8" diameter mounting hole. If you are mounting on a pick guard you want 1/4" bushing height.