15W LED Aluminum Printed Circuit Board 1.al base 1.6mm,copper 1oz 2 ... 3.diameter:90mm 4.TAIYO ink 15W LED Aluminum Printed Circuit Board1.al base 1.6mm,copper 1oz2.thermal ... lead free), Immersion Gold, OSP02LayerSingle-sided, double-sided, multilayer and special structure layer03Max size1200mm*600mm04PCB thickness0.5-3.3mm05Copper ... , black, blue, yellow, red 15W LED Aluminum Printed Circuit Board