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Best Price! 100% Tested QSFP-40G-LR4 Module compatible with Cisco 40G LR4 MPO-12 10KM 20KM SMF 3-Year Warranty Support 
40G LR4 compatible with Cisco QSFP-40G-LR4 Replacement 40GBASE-LR4 1310nm 10KM 20KM OM4 SMF MPO-12 to 4xLC Fiber Breakout Solution 
Datacenter Grade Fiber QSFP-40G-LR4 Transceiver Compatible Cisco/Juniper 40G LR4 MPO SMF 10KM 20KM 4x10G Aggregation
OEM Equivalent QSFP-40G-LR4 40G LR4 for Cisco Switch Module 4 Lanes 1310nm MPO-12 10KM 20KM single-mode Fiber 
Plug & Play QSFP-40G-LR4 for Cisco 40GBase-LR4 1310nm 10KM 20KM SMF Low Latency MPO-12 Connector DAC Option - Bulk Stock QSFP-40G-LR4 Module for Cisco Compatible 40G LR4 MPO-12 10KM 20KM SMF DDM Function OM3/OM4 Support