Perfect for large-scale deployments or installations on multiple devices this bulk pack of Gigabit fiber SFPs provides maximum cost savings. Built to exacting specifications and fully tested to ensure maximum performance these high-quality transceiver modules can be installed into Cisco switches and routers that support the GLC-LH-SMD transceiver module as well as other major brands of networking equipment. The SFP transceivers provide a dependable and cost-effective way to add replace or upgrade the Gigabit fiber ports on your 1000Base-LX/LH networking equipment and they're backed by a lifetime warranty. The SFP transceivers included in this 10-pack are manufactured by StarTech.com to meet or exceed OEM specifications and comply with the industry's MSA (Multi-Source Agreement) standards. Committed to the highest standards of quality StarTech.com produces an extensive range of networking products including copper and fiber network cards fiber media converters Ethernet switches and wireless products. StarTech.com SFP transceivers are configured and fully tested to ensure they work seamlessly with Cisco or other major brands of networking equipment.