5V 12V 40x40x10mm DC Brushless Fan SA4010 https://www.shengjiuglobal.com/Cooling-Fans/SA4010.html Overall Dimension:40x40x10mm Material:Impeller &Frame Plastic(Fire Rating UL94V-0) Lead Wires : UL 1061 AWG#26 or Equivalent Impeller: 7 Blades Rotational direction CCW view from impeller side Mass: 18g