Nvi Dia Qsfp-100g-Lr4-S Compatible 100gbase-Lr4 Qsfp28 1310nm 10km Dom Duplex LC/Upc SMF Optical Transceiver Module US$230.00 / Piece Ex4600-40f-Afo Ex4600, 24 SFP+/SFP Ports, 4 Qsfp+ Ports, 2 Expansion Slots,