100K OHM Trimpot Variable Resistor 6mm
Product Review (submitted on November 9, 2013):
these are a must have for everyones parts collection. for when you need adjustable, or just need a close value (set with a multimeter). If you bend the legs just right, you can get them to fit on a standard breadboard, but be careful. If the circuit is not too cluttered, you can set by hand, otherwise try to use something plastic to avoid accidental connections, especially in radio/rf/rc circuits when tuning.