AvatarRC Geniune Gemfan 5040 (5x4) Orange Propellers for 250 Size Quadcopters,Drones, and Multi-rotors - Perfect for 210mm to 300mm frames 100% Real and Genuine High Quality Gemfan 5040 (5x4) Propellers Very Popular size Propellers for FPV Multirotor Racing Drones (quadcopters) Used by some of the Best FPV 300, 280, 250, 220, and 210 size Racers and pilots 8 total propellers, 4 clockwise (CW) and 4 counterclockwise (CCW). Can properly fly two quad drones or use as spare propellers Mix and match front and rear colors to help fly Line-of-Sight (LOS)