The NTE291 (NPN) and NTE292 (PNP) are General–Purpose Medium–Power silicon complementary transistors in a TO220 type package designed for switching and amplifier applications. They are especially designed for series and shunt regulators and as a driver and output stage of high–fidelity amplifiers.

Full spec sheet:

https://www.nteinc.com/specs/200to299/pdf/nte291.pdf