XOAR PJM-E 12x4 Electric RC Airplane Propeller. 12 Inch 2 Blade Black Wood Prop for Electric Motor PREMIUM MATERIAL: Made of Premium Top Grade German Pollmeier Beechwood. It is excellent for minimal elongation, breakpoint and distortion, therefore it is the best for making Wooden Model Airplane Propellers. CNC DIGITAL IMAGING: CNC digital imaging process ensures consistent quality in diameter, propeller blade profile and pitch which are all crucial for RC Plane performance. PRE-BALANCED* : Each Xoar prop is manually finished to reach perfect surface smoothness. It is balanced both horizontally and vertically for minimal vibration caused by RC airplane propeller. COLOR: Metallic Black Matt Paint Finish SPEC: Diameter: 12 in | Pitch: 4 | Weight: 18g | Shaft Diameter: 6mm | Type: Tractor Propeller