... of the top level free pcb sample, free sample pcb board, request sample board, custom sample pcb, pcb sample prototype, pcba sample service manufacturers and suppliers. ... lowest price for pcb prototype in china1.No setup fee,2.No test feeThe PCBs we supplied are widely ... 32Layers2HDI Type1+N+1, 2+N+23MaterialCEM3, FR-4, Halogen Free, Aluminum-based, Teflon,Rogers, Getek, Nelco, PTFE, Polyimide ...