OEM Shenzhen Electronics Multilayer Printed Circuit Board Double-Sided PCBA PCB. Wide Layer Range: Supports 1 to 20 layers for complex multilayer PCB designs. Customizable Solder Mask: Available in Green, Yellow, Black, White, Red, or Blue colors. Diverse Surface Finishes: Options include ENIG, OSP, HASL, Chem Tin, and Flash Gold. High Precision Specs: Min line width 3mil, min hole 0.1mm, tolerance 0.10mm. Fast Turnaround: Standard lead time 24 hours for 2-layer boards. Comprehensive Certifications: UL, ISO 9001, ISO 14001, and IATF16949 certified. Sample Availability: Samples available for testing with mixed orders accepted. Small Order Friendly: Accepts small wholesale orders and even single piece requests.