Gemfan props are the top choice for FPV mini quadcopters. New 4" props are designed for sub 250mm frames. 4045 props give you a good power and increased responsiveness. Bullnose props have more surface area so the provide even more thrust than the standard 5045 props. Each pack includes 4 Nylon Bullnose (2 cw, 2 ccw) propellers.