This is a MALE RS232 to TTL signal serial converter cable. The type I cable converts a serial signal to TTL with connections for Tx, Rx, +3V/5V and ground. The TTL connector is a 4-pin Friction Lock with a 0.100" pitch.
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!