... star pcb 1,Factory directed price 2,Fast lead time and small accpted 3,High quality 4,Quality Certification App led aluminum star ... pcbLayer: 1-30Board finished thickness:0.21mm-7.0mmMaterial:FR-4 ... Chemical gold, immersion silver /gold,OSP,gold platingCopper thickness:35um 1.0oz/3oz-60zSolder mask color: greenBoard thickness :min0.15mm,Max ...