This Threaded Prop Adapter is the same one that is included with 3008, 3014, 3020, 3026 and 3032 series Scorpion Brushless motors. Machined from High-Quality Aluminum bar stock, it is designed to fit on a 5mm motor shaft, and has a 6mm threaded prop shaft. The Scorpion 5mm Threaded Prop Adapter weighs 8.8 grams, and can be used on any brushless motor with a 5mm shaft.