In Stock: CISCO GBIC, CISCO SFP, CISCO SFP+, CISCO XFP, CISCO XENPAK, CISCO X2 Transceiver module *NEW SEALED* CISCO GLC-SX-MM 1000BASE-SX SFP transceiver module for MMF, 850-nm wavelength, dual LC ... , for more details, please feel free to contact us, thanks! Cisco SFP transceiver module 1000BASE-SX SFP 850nm 550m GLC-SX-MM