ITEM NAME:Turbo Fan Intake Fuel Saver Fan - Blue Q4N3 Turbo Fan Intake Fuel Saver Fan - Blue Q4N3 Fan of turbine fuel saver with a single propeller Provides a more dynamic control over the intake system by forcing powerful airflow into the combustion chamber at an elevated speed Universal fit for air intake pipe with a diameter between 65mm and 74mm (2.5 to 2.9 inches) The improvement of power and fuel economy's capacity Book with 2pcs rubber mounts Maximum movement speed: 55,000 rev / min Material: Aluminum alloy and rubber Size (L x Dia.): Approx. 2 x 2.5 inches / 5 x 6.4 cm Colour:Blue Package Includes: 1 x Fan has fuel sparing turbine 2 x rubber support Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Fan of turbine fuel saver with a single propeller. 1 x Fan has fuel sparing turbine. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.