Cisco 10GBASE-ER SFP+ Module, 40 Km, REF, SFP-10G-ER, Refurbished, Original

The Cisco 10GBase-ER Module is compatible with Nexus 5000 and 7000 series switches as well as others such as the 9500 series switches, and supports a link length of 40 kilometers on standard single-mode fiber.