Description: No Batteries or Electricity Required - The Stove Fan Uses Heat From the Stove Surface to Spin,Adjust its Speed Automatically with the Stove Surface Temperature. Large Airflow,Increase Stove Efficiency with Burn Less Fuels,Silent Operation.Less Consumption ,More Efficiency - Reduce the fuel consumption and make the room warmer quickly. Whisper Quiet - Flue Pipe Hanging Mount, fit 5-6 inch Pipe. Fireplace Fans Material - Made of high strength aluminum alloy which makes the stove fan no burr, fined and neat surface. no deformation and no discoloration even after long time working under high temperature. Saving and environmental protection - The heat powered stove fan is designed to circulate the warm air created by a wood / coal or pellet burning.FULLY utilize the heat from your wood stove and disperse it to your room, and make the room warmer quickly,Less Consumption ,More Efficiency--Reduce the fuel consumption. Specification: Material: Aluminum Alloy Number of Blades: 6/Per Air volume CFM: 160-200 Working temperature: 50°C-350°C Size: 165x165mm/6.50x6.50 inch Package Includes: 2 Pieces Heat Powered Stove Fan (Black+Silver) Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thanks!