H!Fiber.com 2 Pack 10GBase-LR Module with QSA Adapter, 10G Single Mode SFP+ LC Transceiver, 40G QSFP to 10G SFP+ Converter Module for Cisco CVR-QSFP-SFP10G and More Devices, All-Metal housing

10GBase-LR Module: 10 Gigabit Ethernet Single mode SFP+ Module, 10 Gb/s, 1310nm wavelength, Dual LC, SMF, operates on Single-mode fiber cable (OS2) spans of up to 10km (6.2 mile) in length. 2 Pack.
40G QSFP to 10G SFP+ Converter Module allows smooth and cost-effective migration to 40 Gigabit Ethernet by providing an option to use lower-speed 10G SFP+ modules or cable in empty QSFP ports.
QSA adapter widely applicable to Multiple brand switches, servers and routers with QSFP port, meets your various needs. Easy installation, plug in and work, fully hot-pluggable.
QSA Adapter with All-metal housing for superior EMI performance, Low insertion loss, Low crosstalk, Secure latching mechanism. Compatible with RoHS, SFF-8436, SFF-8432.
What you get10GBase-LR Transceivers x2, QSA Adapter x1. Enjoy 30-day free-returned and 1-year warranty service.