GrenTech 1.25G SFP EX uses a DFB laser and it is a duplex LC connector. This 1GB copper SFP can transmit up to 40km over 9/125uF single-mode fiber and compliants with SFF-8472 and SFP MSA, the performance is stable, mainly uses in 1G Ethernet switches, routers and fiber channel switches, etc. Get 1.25G SFP EX price now!