These 5.1″ propellers are made of strong polycarbonate and have a pitch of 2.5.

Package Includes:

2 x CW HQProp 5.1X2.5X3 propeller
2 x CCWHQProp 5.1X2.5X3 propeller

Specifications:

Propeller Diameter: 5.1 inch
Pitch: 2.5
Blades : 3
Material: Poly Carbonate
Weight:3.1g
Hub Diameter : 11.5mm
Hub Thickness:6mm
Shaft:5mm
Adaptor Rings: NP