This product is either discontinued or we cannot get that from suppliers.
NETGEAR GS752TX-100AJS S3300-52x - Prosafe 48-port Gigabit, Ethernet Switch, SFP Slots 2, Network (RJ-45) Ports 50, Port 2 x 10 Gigabit Ethernet Network, 48 x Gigabit Ethernet Network, 2 x 10 Gigabit Ethernet Expansion Slot, Network 10GBase-X, 10/100/1000Base-T, Twisted Pair, Desktop, Rack-mountable.
The Netgear GS752TX-100AJS ProSAFE S3300 Series are a new generation of Gigabit Stackable Smart Switches inclusive of 4 10G ports, which can be used for uplinks and/or stacking between other S3300 switches.