Cisco QSFP-40G-LR4 Compatible 40G QSFP+ LR4 1310nm CWDM4 10km LC SMF DDM Transceiver Module
Cisco QSFP-40G-LR4 Compatible QSFP 40G LR4 Fiber Optic Module with 4 CWDM lanes MUX/DEMUX design. The central wave lengths of it are 1271, 1291, 1311 and 1331 nm.

