... ,Immersion Tin, OSP(Entek) Base Material:Polyimide(Kapton), Polyester(PET), Aluminium, FR4Copper Foil:ED/RAMin. Line Width:4milMin ... Routing, V-cutSoldering Thermal Resistance:300°C/10 secondsPeeling Strength:≥1.4kg/cmSurface Resistance:105mΩInsulation Resistance:105mΩDielectric Strength:9 ... work well perfect products. PHOTOS SHOW Single sided Aluminum PCB with thickness 1.6mm,copper weight0.5 oz,HASL