This is the

Ethix P3.5 RAD Berry Prop (2CW+2CCW)-Poly Carbonate EthixP3.5-RB-PC

Propeller Diameter: 5.1 inch      
Pitch : 3.5                
Blades : 3
Material : Poly Carbonate        
Weight :3.5g
Hub Diameter :12.5mm          
Hub Thickness:6mm          
Shaft :5mm
Adaptor Rings : NO

Includes
2 x CW Ethix P3.5 RAD Berry  Prop
2 x CCW Ethix P3.5 RAD Berry  Prop