Great Planes 3.0mm Input to 5mm Output Collet Cone Adapter FEATURES: Aluminum construction, silver in color Mounts on electric motors with a 3mm shaft and adapts them to a 5mm diameter prop shaft Cone shaped s INCLUDES: One 5mm Prop Shaft One Aluminum Knurled Prop Hub One Aluminum Prop Washer One Aluminum Spinner Nut (5mm threaded) REQUIRES: Installation