... single side HASL board 2.single side with HASL 3.1.6mm thickness board 4.UL ISO9001 certificater 5.solder mask:green single ... reference: DescriptionDetails SpecificationBase MaterialFR-4,Aluminium-backed board,Halogen-free,Lead-free compatible,High Tg, ... typeHigh precision multi-layer board,Blind hole board, Buyerd hole board,High frequency board,Aluminium backed boardCertificateISO9001.UL etcWelcome ...