This WH148 potentiometer kit includes 20 rotary variable resistors with 10 different resistance values: 1K, 2K, 5K, 10K, 20K, 50K, 100K, 250K, 500K, and 1M Ohm—2 pieces per value. Each potentiometer features a single-turn linear taper and standard 3-pin design, offering smooth and precise control for adjusting signal, volume, or speed in various electronic circuits. The set also comes with 20 plum-style plastic knob caps for better grip and customization. All components are neatly organized in a labeled plastic storage box for quick access and easy organization. Ideal for Arduino, breadboard testing, repairs, and DIY electronics, this kit is a must-have for students, hobbyists, and professional engineers.