Layer NO# 1 Layer Material: Aluminum 2.8 W/m.k Finished Thickness: 1.6mm Outer Copper:/ 2 OZ Surface treatment: HASL LF Min Line Width: ≥ 0.3mm Min Line Space: ≥0.30mm Min Hole: ≥1 mm Solder Mask: White X 1 side Silkscreen: Black X 1 side Application: LED Light