These are the high performance Intel PRO/1000 PT Quad Port Server Adapter LP PCI-E.  These adapter boxes have never been opened.  Part code is EXPI9404PTL, these were manufactured in 2009, but are as relevant today as the day they were made.

Based on the Intel 82571GB network controller processor, supports data rates of 10,100,1000 Mbps, PER PORT!!!

Note that these are PCI-Express bus.

Be sure to google Intel and EXPI9404PTL to get the datasheet for this NIC, I want you to be happy with your purchases.

If you buy multiple of these units, I will condense the shipping and bring the shipping costs down.