Darkhorse 2 Pairs Genuine DJI Phantom 3 9450 Props Self-Tightening Propeller 9" All Composite For Professional and Advanced - White + Red Stripe Self-tightening design keeps the propellers securely to each motor Compatible with Phantom 3 Professional and Phantom 3 Advanced Durable plastic construction provides both lightness and rigidity Includes two pair of propellers: 2 clockwise and 2 counter-clockwise propeller. Basics: each propeller weights 13g