HP J4860C ProCurve X121 Gigabit-LH-LC Mini-GBIC SFP Module

£159.00

A small form-factor pluggable (SFP) Gigabit LH transceiver that provides a full-duplex Gigabit solution up to 70 km on single-mode fiber

Ports: 1 LC 1000BASE-LH port (no IEEE standard exists for 1550 nm optics); Duplex: full only
Connector type: LC
Wavelength: 1310 nm
Form Factor: SFP

Further details can be found in this link.