1.dual fiber cwdm mux/demux 2.16 channel cwdm module 3.fast delivery 4.lifetime warranty ... also available)Built in Mux and Demux in one unitLC Connectors (FC, SC also available)Dual fiber is used for both ... , 1591, 1611 nmChannel bandwidth +/- 6.5 nmInsertion Loss mux/demux pair (max) 4.8 dBIsolation (min) 30.0 ... , Cisco, Nortel, Alcatel, Ciena, Fujitsu, etc. Dual Fiber 16-Channel CWDM Mux/Demux