This is an aluminum infrared proximity sensor bracket kit for Infrared Proximity Sensor. With this kit,one RB-421 Servo and one Infrared Proximity Sensor you can build a 2 degrees freedom servo mount assembly.This kit is professional in steering the infrared proximity sensor on a robot for 180° of rotation side to side and front to back.These parts also have holes at 20mm spacings so they can be attached to Seeed Starter Bundle Harness which has 20mm spacings as well. DocumentsPlease visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to our forum.