... and after sales service. Specializing in Double Side PCB, Multi-Layer PCB, F4BK PCB, Ceramic PCB, Rogers PCB, Aluminum PCB.1.Single-sided ... , double-sided and multi-layer boards.2.HAL, HAL lead free, Immersion ... , etc.Legend: white, yellow, black, etc. NO Item Craft Capacity1 Layer 1-30 Layers 2Base Material for PCBFR4, CEM-1, Aluminium ...