3w LED PCB with 3 lights: 1. 2.7W aluminum base material 2 ... , China. It's specialized in manufacturing single side PCB, double side PCB, multilayer PCB, especially in aluminum PCB, ... multi-layer board, high density board, including MLB with blind/buried via holesMain base material:FR-1, ... 4, CEM-1, CEM-3, High Frequency Laminate with various dielectric constant (imported or from local supplier), ...