HP Option Part #: 458492-B21
HP Spare Part #: 458491-001
Compatible with: DL1000, DL120 G6/G7, DL160 G5/G5p/G6, DL160se G6, DL165 G5/G5p/G6/G7, DL170e G6, DL170h G6, DL180 G6, DL185 G5, DL320 G6, DL360 G6/G7, DL365 G5, DL370 G6, DL380 G6/G7, DL385 G5/G5p/G6/G7, DL580 G5/G7, DL585 G5/G6/G7, DL980 G7, ML110 G6/G7, ML150 G6, ML330 G6, ML350 G6, ML370 G6, SL160z G6, SL165s G7, SL165z G6/G7, SL170s G6, SL170z G6, SL2x170z G6, SL390s G7, and possibly others.