The Gemfan Hurricane SL 5125 3-Blade has been designed as a high-speed propeller. These props have a shaft hole of 5mm and 1.5mm, which can be used on your 5" quads or toothpicks builds!Choose a color! (Clear Gray, Clear Blue, Blue Green, Pink, Yellow)SpecificationsDiameter: 5.1"Pitch: 2.5"Blades: 3Material: PolycarbonateBlade Diameter: 129.54Hub Thickness: 5.5mmShaft Hole: 5mm and 1.5mm T-mount with the optionally included insertWeight: 2.8/3.0g(with adapter)Includes2 x CW Gemfan Hurricane SL 5125 3-Blade Propeller - 1.5mm Shaft 2 x CCW Gemfan Hurricane SL 5125 3-Blade Propeller - 1.5mm Shaft