Cox .049 / .051 Propeller 4.5 x 4 LEFT Hand & Pusher Features:4.5" Diameter x 4" Pitch Ideal for control line flying LEFT HAND rotation When mounted "reversed" and run clockwise, it will act as a "pusher" Also suited for competition/racing applications Brand new Original Cox item Application: All Cox .049 reed valve engines All Cox .051 reed valve engines Cox engines in "pusher" mode