Double-sided aluminium PCB with HASL 1.The board is good quality. 2.we offer ... a best price 3.the delivery is quickly ZXH PCB simple profileBoard material:imported from Taiwan ,made- in-china,NEC ... :270*280mmSurface finishing :HASL,LFHASL,HAL,Chemical Tin,Chemical Gold,Immersion Sliver/Gold,OSP,Gold PlatingSolder mask color:white ,black,yellow,red,green ...