400GBASE-DR4 OSFP112 Flat Top CMIS 5.2 SMF 1310nm 500m Transceiver 100% OEM Compatible 400GBase-DR4 OSFP112 Flat Top Heat Sink Transceiver (Parallel SMF, 1310m, 500m, MPO-12 APC, DDM, C-Temp, IB NDR and Ethernet, CMIS 5.2)