Part
J8440A
is compatible in the following Models:
HPE 3400 cl Switch Series
ProCurve Switch 3400cl-24G - J4905A
ProCurve Switch 3400cl-48G - J4906A
HPE X2 CX4 Transceivers
HPE ProCurve 10GbE X2-CX4 Transceiver - J8440A