... , Impedance Controlled, Vias Plugged with Solder Mask. 4-Layer PCB,Gold Finger,Red Solder Mask,HASL,Impedance Controlled,Vias Plugged with ... Abrasion>= 6HFlammability94V-0Surface FinishingHASL, LF-HASL, ENIG, Flash Gold, Immersion Tin, Immersion Silver, OSP,Gold Finger, Peelable Mask, Carbon PrintingMaterialFR4, ROGERS, Taconic ...