... quick turn prototype and small quantity PCB as with short lead time .We choose the best material for all our products ,and ... FR4 ,FR-4 ,etc.Board Thickness : 0.4-6.0mmTreatment :Lead Free HASL ,ENIG ,Immersion Tin ,Immersion Silver ,OSP etc,Solder ... hope to your most reliable partner in the near future. Lead Free Hasl PCB board