This is the

HQProp 7X4.5 Light Grey (2CW+2CCW)-Poly Carbonate-POPO DP7X4.5GR-PC-POPO

Propeller Diameter: 7 inch       
Pitch : 4.5                
Blades : 2
Material : Poly Carbonate        
Weight : 6.6 g
Hub Diameter :13.5mm           
Hub Thickness:7.5mm           
Shaft :5mm
Adaptor Rings : NO

Includes
2 x CW HQProp 7X4.5 propeller
2 x CCW HQProp 7X4.5 propeller