This product is either discontinued or we cannot get that from suppliers.
Allied Telesis AT-QSFPLR4, QSFP+ transceiver module, Plug-in module, 1 x Ethernet 40GBase-LR4 - SC single-mode, Cable 40GBase-LR4, Wired, IEEE 802.3ba, 40 Gigabit LAN, Data transfer 11.2 Gbps, 3.5 Watt.
ALLIED TELESIS 40G QSFP+ LR4 Printing System (AT-QSFPLR4) The Allied Telesis QSFP Series offers the latest industry-standard connectivity in a flexible, small form factor.These hot-swappable transceiver modules simply plug into any compatible Allied Telesis product.