Juniper SFP-GE40KT15R13 Compatible 1000Base-BX SFP Transceiver (SMF, Tx: 1550nm Rx: 1310nm, 40km, LC Duplex, DDM, I-Temp) - Guaranteed Compatible: In System tested in over 90 OEM switches, routers and servers. - 99.98% Reliability Rate: Functionally, optically and environmentally tested to exact specifications. - Industry Leading Lifetime Warranty: For more information by product line, visit our Warranty page. - 98% On-Time Delivery Rate: Extensive inventory guarantees same day shipping. - Full Service Technical Support: Call, chat, email or meet for expert optical connectivity support.