HP Part Number: J9309A. HP 4-port 10GbE SFP+ zl Module. Compatible with HP zl series switches. External I/O Ports: 4 open 10-GbE SFP+ transceiver slots. HP Procurve. HP Spares Number: J9309-61201. HP 5500-24G-PoE+ EI Switch with 2 Interface Slots Network Switch - JG241A.
eBay