This product is either discontinued or we cannot get that from suppliers.
Qnap Gigabit Dual-Port LAN-1G2T-I210, Network Expansion Card, Host Interface PCI Express, Port 2, Network Technology 1000Base-X, Form Factor Plug-in Card, Device Supported NAS Storage Device.
The Dual-Port GbE Network Expansion Card from QNAP. This expansion card is designed for QNAP rackmount and tower systems as it comes with a preinstalled low-profile bracket.