The propeller 1045/1045R is a set of counter rotating RC aircraft propellers perfect for use in twin and multiple motor RC airplanes or coaxial RC helicopters. You receive 2 propellers: one prop rotates clockwise cw and the other prop rotates counter clockwise ccw (1 left hand & 1 right hand rotation). These matched rotor blades are a hard to find matched counter rotating pair. The length is 10 inches and the pitch is 4.5 inches per revolution. package include : 2x Multi Rotor Helicopter Propeller Category: Propeller