Duplex LC Senior/Senior Fiber Adapter Black With Blue Module. TIA/EIA64 FOCIS1 compatible adapters. Exceed TIA/EIA568B.3 requirements. Small form factor (SFF) duplex adapter design fits into single module space. Compatible with products for complete modularity. Provide a FOCIS1 senior adapter interface at each end. Accept FOCIS1 compatible senior LC connectors. Choice of phosphor bronze or zirconia ceramic split sleeves to fit specific network requirements. Zirconia ceramic split sleeves are recommended for OM3 multimode and OS1/OS2 singlemode applications. Every adapter is laser marked with Q.C. number to assure 1-percent traceability. LC simplex and duplex adapters are also available separately, and in patch panels or fiber adapter panels to provide a complete LC system solution.