Gikfun B10K B100K B5K B50K B2K B20K Ohm Knurled Shaft Linear Rotary Taper Potentiometer for Arduino EK8359 B10K B100K B5K B50K B2K B20K Ohm Knurled Shaft Linear Rotary Taper Potentiometer Each 1pc B10K B100K B5K B50K B2K B20K Ohm Knurled Shaft Linear Rotary Taper Potentiometer Each 1pc Adjustment Type: top adjustment; Type: single linear (Type B); Features: knurled shaft Material: metal The max value of each is printed on each of them They can be easily used with breadboards because the pin spacing is the same as on common breadboards. you can just push them into the breadboard.