XBR-000139-PCW is a 1000BASE-SX 1/2/4g/s Data Rate Fibre Channel SFP Transceiver, generic for Brocade XBR-000139. It is guaranteed compatible for all Brocade switch and router product lines. This transceiver can be mixed and deployed with Brocade OEM transceivers for seamless network performance and interoperability. PC Wholesale offers a LIFETIME advance replacement warranty on all transceivers (compared to 90 days from most OEM manufacturers).