Rogers RO4350B is the normal raw materials for high frequency PCB ( Rogers PCB ) Usually, Rogers pcb finishing in immersion sliver. We have enough stock for RO4350B material. If you have any requirements for high frequency PCB, Hitech is a great choice. Please send related files to [email protected] for a quick quote. And if you want to know more information about High Frequency PCB, please visit https://www.hitechpcba.com/rogers-pcb .