1.aluminum LED rigid pcb 2.al: 0.8-3.0MM copper1-4oz 3. ... Letter Height0.8mm20Letter Colorwhite, black, blue, yellow, red1.aluminum LED rigid pcb2.al: 0.8-3.0MM copper1-4oz3.thermal conductivity ... .5w/mk4.HASL(Pb free),OSP,Immersion gold aluminum LED rigid pcb