led par circuit board 1) Material:FR4; 2) Certificate: UL, ISO, TS16949; 3) Paypal, T/T,Western Union, led par circuit ... : Vacuum packing / Plastic bag- Outer packing: Standard carton packingCertificateUL, ISO 9001, ISO 14001 Special requirementsBuried and blind vias+controlled impedance +BGAProfilingPunching, Routing, V ...