Cisco SFP-10G-SR-X,10GBASE-SR, 10GBASE-SW, OTU2/OTU2e module (Brand New Sealed)

10GBASE-SR, 10GBASE-SW and OTU2e 850nm MMF. It supports a link length of 26m on standard Fibre Distributed Data Interface (FDDI)-grade multimode fibre (MMF). Using 2000MHz MMF (OM3), up to 300m link lengths are possible.

eBay