StarTech.com Cisco QSFP-40G-LR4 Compatible QSFP+ Module, 40GBASE-LR4, 40GbE SMF Optic Transceiver, 40GE Gigabit Ethernet LC Connector, 10km, 1270nm-1330nm, DDM, Cisco Firepower, ASR1000

Lifetime Warranty (QSFP40GLR4ST) - QSFP+ transceiver module (equivalent to: Cisco QSFP-40G-LR4) - 40GbE - 40GBase-LR4 - LC single-mode - up to 10 km - 1270-1330 nm