This product is either discontinued or we cannot get that from suppliers.
Qnap CABDAC50MSFPPDEC02 SFP+ 10GBE Twinaxial Direct Attach Cable, Network Cable, Twinaxial Cable, Cable Length 16.40 ft, Connector on First End/Connector on Second End 1 x SFP+ Network, Data Transfer Rate 1.25 GB/s.
Connect network-attached storage or other compatible devices to 10 Gb/s networks with the SFP+ 10GbE Twinaxial Direct Attach Cable from QNAP. This 16.4' network cable has SFP+ connectors on either end.