Chinese Topspeed PCB & PCBA Manufacturer-ALLPCB. ALLPCB is a top speed pcb manufacturer in China, specializing in high quality and cheap pcb prototype & production, pcb assembly and smt stencil services online specification: 4 layers Base Material:FR4 Copper Thickness:2oz Board Thickness: 1.6mm Min. Line Spacing:4mil (0.1mm) Surface Finishing:HASL with lead Min. Hole Size:0.2mm/8mil Product type:custom pcb manufacture Delivery: Delivery time :1-2 days for standard 1-2 layers DHL 3-5 days