Quick view Enterasys Compatible 40GB-ER4-QSFP 40GBASE-ER4 QSFP+ Transceiver Enterasys Compatible 40GB-ER4-QSFP 4x10Gb/s 40GBASE-ER4 SMF Duplex LC 40km QSFP+ Transceiver Module $975.00 Add to Cart