Model:EW-SFP-10G-MD850 10G , Commercial Standard 10G SFP+ Multi-mode Dual Fiber SFP Module 850nm 300M(EW-SFP-10G-MD850) Model:EW-SFP-10G-SD1310 10G , Commercial Standard 10G SFP+ Single-mode Dual Fiber SFP Module 1310nm 10KM(EW-SFP-10G-SD1310)