The HPE 142258-003 is a black AC jumper cord for connecting equipment with a C13 inlet to a power distribution unit with a C14 outlet. Its C14 male to C13 female connector arrangement defines the connection at each end.
The cord is rated for 250 V and uses 16 AWG conductors. At 3 m (9.8 ft) long, it provides a defined reach between compatible power connections in a rack or equipment setup. This is a power cord, rather than a device power adapter.