Spectrol 3296X-1-254/64X254 Cermet Trimmer Potentiometer, 250k Ohm, 3/8" Square, 0.395" L x 0.375" W x 0.19" D (Pack of 10): Amazon.com: Industrial & Scientific
Spectrol 43Y254/3006Y-1-254 Rectangular Cermet Trimmer Potentiometer, 250K Ω, 0.75" L x 0.19" W x 0.25" H (Pack of 5): Amazon.com: Industrial & Scientific
Short-Shaft Potentiometer, 250k (Tone) – PRS Guitars West Street East Accessory Store
Trimmer 250K Ohm Single Turn Cermet Side Adjust 3/8 Inch Square Sealed 10% Tolerance 1/2 Watt - Nutech