Cisco Small Business MGBLX1 - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-LX - LC single-mode - up to 10 km - 1310 nm - for Business 110 Series, 220 Series, 350 Series, Small Business SF350, SF352, SG250, SG350

The Cisco MGBLX1 Transceiver MGE Small Form-Factor Pluggable (SFP) or mini Gigabit Interface Converter (mini-GBIC) is an easy-to-install module that provides a simple way to add fiber connectivity to Cisco 100, 200, 300, and 500 Series switches. The MGBLX1 transceiver is available for single-mode or multimode fiber-optic cabling and can support distances from 100 meters up to 40 kilometers.