... technologyIndepedance,Blind buried via,thick gold,aluminum PCBSurface finishHASL,Lead free HASL,Immersion Gold, Immersion Tin, Immersion Silver,OSP ,ENIG , ... 1, CEM-3, Aluminum base material. 3. HAL, HAL lead free, Immersion Gold/ Silver/Tin, OSP surface treatment. 4. Printed Circuit ... 360 days warrantly. 2.If the item you purchase from our store are not of perfected quality,that is they do not ...