1.25Gb Fiber SFP Optical Transceiver Module SC 20KM 1310nm/1550nm Singlemode Gigabit DDM Compatible with Cisco/Mikrotik Switch WholesaleBuy Directly From FASO Communication Equipment Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.