StarTech.com MSA Compliant QSFP+ Transceiver Module - 40GBASE-LR4~MSA Uncoded QSFP+ Module - 40GBASE-LR4 - 40GbE Single Mode Fiber (SMF) Optic Transceiver - 40GE Gigabit Ethernet QSFP+ - LC 10km - 1270nm to 1330nm - DDM, Fiber optic, 40000 Mbit/s, QSFP+, LC, LR4, 10000 m