RAYCorp - Genuine Gemfan 5050 3-blade 5x5x3 Competition Grade Propellers. 16 Pieces(8 CW, 8 CCW) 5-inch Professional Quadcopter and Multirotor Glass Fiber Nylon Filled Black Props PACK OF 16 PROPELLERS, 8 Clockwise (CW) & 8 Counter-Clockwise (CCW) - Color : Black (16 props) 100% Genuine & Brand New. Made with High Quality Glass Fiber Filled Nylon for Maximum Performance, Durability and Balance. Perfect for 250 sized to 280 sized FPV racers like : QAV250, HK250, Walkera 250, FPV250, Immersion RC Vortex 285, Blackouts & other multirotors, quadcopters and hexacopter. RAYCorp is an authorized US dealer of Gemfan Hobby Co Ltd