We are Great Wall Circuits Co., Ltd. based in Shenzhen, China. We are member of TradeKey.com since March, 2012. Our business is related to Electrical & Electronics Supplies industry and we specifically deal in pcb, pcba, pcb assembly, led pcb. Please find our product details below:Rigid Multilayer PCB1.Number of Layers: 4-Layer2.Base Material: FR-4/Ali-base/Ceramic/Teflon3.Copper Thickness: 7-175um4.Board Thickness: 0.2-4.5mm5.Packaging Detail: vacuum bag packing6.Delivery Detail: 3-10Electronic PCBA&PCB Assembly1.Base Material: FR4, Aluminum, TG, CEM-12.Copper Thickness: 0.2-3.0OZ3.Board Thickness: 0.5-3.0MM4.Min. Hole Size: 0.25MM5.Min. Line Width: 0.15MM6.Min. Line Spacing: 0.15MMThank you for taking time to go through our business profile. If there are any questions, inquiries or comments, please feel free to contact us.