... .1.Single-sided, double-sided and multi-layer boards.2.HAL, HAL lead free, Immersion Gold/ Silver/Tin, OSP3.Fast turnaround Prototypes ... of Origin: ShenZhen China (Mainland)Brand Name: RIDECONSurface Finishing: HAL, Lead Free HAL, Immersion gold, OSP, Immersion tin, Immersion silver, etcSoldermask: green ...