... 5.UL,SGS,ROHS,ISO9000. We can manufacture PCB in higher quality, more competitive price, quicker ... us freely!ItemSpecification MaterialFR-4 / Hi-Tg FR-4 / Lead free Materials(RoHS Compliant)/CEM-3 ... layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm(tolerance) ... the first time,+/-2%(tolerance) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! single-sided high tg fr4 pcb