... Fkx co.,ltd 4layer HASL circuit board ,multilayer 4layers PCB with high quanlity ,best price and fast delivery ... SpecificationBase MaterialFR-4,Aluminium-backed board,Halogen-free,Lead-free compatible,High Tg,High CTI,CEM-1,CEM-3 ... platingProduction typeHigh precision multi-layer board,Blind hole board, Buyerd hole board,High frequency board,Aluminium backed boardCertificateISO9001.UL etcWelcome to ...