400G QSFP-DD transceivers, DR4/FR4/LR4/LR8, up to 10km

Dear SirNowadays with the development of the high speed network, 400G optical transceivers become more and more popular.here I would like to recommend followng 400G parts to you.400G QSFP-DD DR4 500M400G QSFP-DD FR4 2KM400G QSFP-DD LR4 10KM400G QSFP-DD LR8 10KMAll those comaptible with Major brand like Cisco, Juniper, ARISTA etc.want to talk more?Best Regards|Sales ManagerShenzhen Sky Optics Technology Co., LTD