For QSFP-DD to QSFP-DD 400G DAC, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our QSFP-DD to QSFP-DD 400G DAC has been well received by many customers and enjoyed a good reputation in many countries. Zhaolong InterconnectQSFP-DD to QSFP-DD 400G DAC have characteristic design & practical performance & competitive price, for more information on the QSFP-DD to QSFP-DD 400G DAC, please feel free to contact us.