... China Aluminum base PCB 2.size: D50*1.6mm, copper 1oz 3.black soldermask,white legend 4.lumen pad. 1.5w China aluminum base pcb2 ... 1oz3.black soldermask,white legend4.lumen pad. Sanny Capacity of aluminum base pcb NO. ITEM INDEX 01Surface treatmentHAL(lead free), Immersion Gold, OSP02LayerSingle ... .15mm19The Minimum Letter Height0.8mm20Letter Colorwhite, black, blue, yellow, red Aluminum base PCB