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
G23603 - (Pkg 10) Piher PT10 Series 250K Horizontal Mount 10mm Trimmer| The Electronic Goldmine