FR4 Material, 2-Layer, ENIG, Green Solder Mask,RoHS Compliance.4oz Copper FR4 PCB,2-Layer,ENIG4oz CopperGreen Solder Mask,RoHS ... Abrasion>= 6HFlammability94V-0Surface FinishingHASL, LF-HASL, ENIG, Flash Gold, Immersion Tin, Immersion Silver, OSP,Gold Finger, Peelable Mask, Carbon PrintingMaterialFR4, ROGERS ...