Juniper Networks SRX-SFP-10GE-ER Compatible 10GBase-ER SFP+ Transceiver (SMF, 1550nm, 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.