... with Taconic Material, Immersion Tin, Impedance Controlled, Vias Plugged with Solder Mask, RoHS Compliance. 12-Layer PCB,Taconic Material,2.0mm Thickness,Immersion Tin ... ,Impedance Controlled,Vias Plugged with Solder Mask,RoHS Compliance. CertificatesULISO9001TS16949ISO14001 ...