1) It's the best cooling tool for notebook. 2) It's low noise for the fan. 3) It's hot product in summer holiday. 1.Material :Plastci,aluminium alloy,iron.2.Machined by lathe, milling machine, saw, punching machine, bending machine, precise CNC.3.Surface treatment: mill finish, anodized sliver ,anodized bronze, anodized champagne, anodized black pearl, various power coating color, electrostatic ...