... board, circuit board 2.PCB board and assembly 3.Certificate:ISO,UL 4.1 to 24 layer 5.Accept small order phone pcb board, circuit board ... Tg FR4, FR1, CEM-1, FR-4,etc. Board Thickness: 0.4-3.0 mmTreatment : Lead Free ... Black, Blue.1. We can provide quickturn prototype and small quantity PCBs with short lead time. 2. ... The quality of Our products is excellent and stable. 3. We choose the best material ...