JMT 8*5" 3k Carbon Fiber Propeller Cw CCW 8050 Cf Props Cons for DJI F450 F550 Rc Quadcopter Hexacopter Multi 8*5" 3K Carbon Fiber Propeller CW CCW 8050 CF Props Cons For DJI F450 F550 RC Quadcopter Hexacopter Multi Just fit for DJI Motor,DJI Model Carbon fiber forward propeller Carbon fiber reverse propeller The Bore Dia is 8mm,No washer request.