CPAK transceiver module - 100 Gigabit Ethernet - 100GBase-SR4 - MPO multi-mode - up to 328 ft - 850 nm - for P/N: A9K-8X100GE-CM, A9K-8X100GE-CM=, NCS4K-2H10T-OP-KS=, NCS4K-2H-O-K=, NCS4K-2H-W