HQProp R37 5.1X3.7 / 3-Blade Propeller Set (5mm Bore / Blue)

These props are designed for pilots looking for durability. They are built to withstand impacts and crashes with high efficiency.   SPECIFICATIONS: Propeller Diameter: 5.1" Pitch: 3.7               Blades: 3 Material: Poly Carbonate         Weight: 4.1g Hub Diameter: 13.3mm            Hub Thickness: 7mm            Shaft: 5mm Adaptor Rings: No   INCLUDES: (4) HQProp R37 / 5.1X3.7 3-Blade Propellers (2CW + 2CCW)