Fangrui Product Details Compatible . Use The Potentiometer To Change Your A- 3d Analog Stick Joystick To Hall Effect Joystick. Easy ,remove Your A- Potentiometer And The Hall Effect Potentiometer. Colour:as Shown Material:plastic+metal Package Contents: 20pair X Hall Effect Rocker Potentiometer(due To Different Product Batches, The Appearance , Which Does Not Affect The Use) Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.