HP 9000 3.5-inch Hot-Swap Hot-Plug Drive Tray / Caddy for HP 9000 servers, rp3400, rp7420.
Compatible with the following HP products servers that uses 3.5" drives:

rp3400, rp3410, rp4410, rp7420, rp8420, Itanium 2 Workstations and the Superdome servers.

Note: List is not all inclusive. Please double check your existing tray or picture to make sure that this is the tray you need.