These are the Tri-blade version of the popular HQ T4x2.5 props. Great option for ultralight builds like the Racer X Mutant 4″ and similar frames with T-mount motors.
Specifications
Propeller Diameter: 4 inch
Pitch : 2
Blades : 3
Material : Poly Carbonate
Weight :2.0g
Hub Diameter : 9.8mm
Hub Thickness:5mm
Shaft :1.9/1.4/1.9mm
Adaptor Rings : NO