... delivery, competitive price 3.good quality and good after sales service double side green color PCB printed circuit board double side ... components supply, assembly services offer.1-12 layer PCB board,1-2 layer Aluminum base PCB1/3oz- 4oz ... copper thickness PCB board,CEM-1,CEM-3, FR4, FR4 High TG, ... Aluminum based etc. double side green color PCB printed circuit board