We were struggling to find some 400G DACs that would work with our Arista switches, but these DACs worked like a charm! Just plugged them into our switches and they worked immediately without any issues until now. Worthy to buy.

Bought two QSFP-DD to 8 SFP56 twinax cable to connect our newly purchased 400G switches. Compared with other vendors I inquired, this cable was priced very competitively and worked exactly as intended.

I knew that FS began to supply 400G products from the social platform by accident, and recently our new project needed to deploy 400G connections, so I ordered two pcs cable from them. If no issues happened to these two, we will order the other several ones again.