... , circuit board :Specializing in Double Side PCB, 4-layer pcb, Multi-Layer PCB, Ceramic PCB, Rogers PCB,Aluminum PCB. MeanwhileLayer: 1-24 Layers Material: Ceramic , F4BK ... material for all our products. 4. We will send the boards to you by DHL, TNT, UPS, FEDEX and so on ... and the 5-Star service are guaranteed. Pls. Send us PCB files or gerber data so that we can quote for ...