Shenzhen Hejin Circuit Co.,Ltd is a leading 4 layer printed circuit board exporter, and one of the leading China 4 layer 

printed circuit board manufacturers, producers and suppliers. We export high quality products, and we are professional at 4 

layer printed circuit board assembly and oem.

Layer Count:4L                            Board Thickness:1.6MM

Copper Thickness: 35UM

Base Material:FR4 

Surface Finishing:Immersion gold

Solder Mask Color:Blue                      UL approved,RoHS compliant
    http://www.hjmcpcb.com