https://www.ebay.com/sch/i.html?_nkw=Addon+Network+Upgrades+D+Link+Dem+431Xt+Dd+Compatible+10Gbase+Sr+Sfp+&_sacat=0&_dmd=2

Addon - Network Upgrades D-Link Dem-431Xt-Dd Compatible 10Gbase-Sr Sfp+

Regular price
$270.00
Sale price
$188.00

Model Brand: AddOn - Network Upgrades Type Type: SFP+ Details Specifications: 1 x 10GBase-SR Features Features: 1 x LC 10GBase-SR Network