1.adopted with Rogers material 2.immersion gold, 6-layers 3.free sample ... sided board, multi-layer board, high density board, including MLB with blind/buried via holesMain base material:FR-1, FR-2 ... , FR-4, CEM-1, CEM-3, High Frequency Laminate with various dielectric constant (imported or from local supplier), Aluminum base ... , we are looking forward to your inquiry! Blue PCB for TV monitor