This O-Ring Plug Sensor Plug Kit is designed for use with Cummins ISB engines. The kit includes a crankshaft position sensor plug and an interchange part number of Plug (1)050587 O-Ring (1)321253. The manufacturer part numbers are 3932296, 3918179, and 3932290. The sensor type is a crankshaft position sensor and it is compatible with engine sensors and switches.