Potentiometer - SODIAL(R) 10PCS Top Adjustment Linear Dual Knurled Shaft Potentiometer 50K Ohm B50K 50K ohm, 6 Terminals, Linear Dual(Type B), Suits Most Standard Knobs. Top adjustment type and knurled shaft for easy operate in daily use time. Main used to control electrical devices such as volume controls on audio equipment. Knurled shaft. With split shaft for push-on knob.