This is the VOX 15x8 Electric Wooden Propeller by Precision Aerobatics. Provides excellent power for sport flying, 3D and precision flying, and yet is still very capable of high energy maneuvers. Great for the Precision Aerobatics Addiction XL, Katana 60, XR-61, and Ultimate AMR 60 (PABADXL, PABKAT60, PABXR61T, PABAMR60).