CHELSIO COMMUNICATIONS T420-CR 10GBASE-X Dual SFP +Chelsio T420-CR Dual port 10 Gigabit Etherne t420-cr-aok.jpg Please ensure that your original part number matches this exactly, or check with the manufactuer for compatiblity. Customers are responsible for compatiblity. This part is guaranteed to be fully functional, original and authentic. t420-cr-aok.jpg