Item: Gemfan D63 5-Blade Propellers Blades: 5 Color: Gray Weight: 1.76g/pc Material: PC Pitch: 1.65in Prop Disk Diameter: 63.5mm/2.5” Center Thickness: 5mm Shaft Hole: 1.5mm Maximum support width: φ11 Recommended Motor: 1106 3800KV Brushless motor