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4 Layer Thickness Copper Gold Finger PCB. Multi-Certification Compliance: Certified by UL, RoHS, SGS, and ISO9001 for quality assurance. Advanced Quality Testing: Includes Flying Probe, Impedance Control, AOI, and 100% E-tested. Fast Sample Delivery: PCB samples ready in 3-4 days; Assembly samples in 2 days. Customizable Specifications: Customizable copper thickness, board thickness, hole size, and line width. Flexible Payment Options: Supports T/T, PayPal, Western Union, LC, and Money Gram. Global Shipping Network: Ships via DHL, UPS, FedEx, TNT, EMS, or Sea freight.