This is a complete set of used wheels (2 drive wheels, 2 idler wheels) with two matched tracks. These are a combination of generation 2 and generation 3 treads. They have been used for testing and have plenty of tread left. Priced reduced significantly!
This is a DS18B20 temperature sensor in a waterproof housing with 3 meter (9.8 ft) long insulated leads. This is perfect for both internal and external temperature measurements in outdoor robotic applications.