The product is a TRU-OHM linear rheostat with a power rating of 25W and a resistance rating of 6Ω (6 ohms).
The model number is RP101SD6R0KK and it is a MIL-SPEC component designed for use in electrical applications.
These are available sealed, untested, or can be opened and tester upon request.
Please message before purchasing with any questions.