... -sided and multi-layer boards.2.HAL, HAL lead free, Immersion Gold/ Silver/Tin, OSP3.Fast turnaround Prototypes & mass production.4.Lead ... (Mainland)Brand Name: RIDECONSurface Finishing: HAL, Lead Free HAL, Immersion gold, OSP, Immersion tin, Immersion silver, etcSoldermask: green, black, blue, white, yellow, purple, and ...