7W Aluminum PCB Board 1.al base 1.6mm,copper 1oz ... conductivity 1.5w/mk 3.diameter:49.5mm 4 HASL 7W Aluminum PCB Board1.al base 1.6mm,copper 1oz2.thermal ... .15mm19The Minimum Letter Height0.8mm20Letter Colorwhite, black, blue, yellow, red 7W Aluminum PCB Board