This is a 10x6 Airplane Propeller that is a "pusher" Prop (see COMMENTS).

FEATURES: Computer-optimized design gives these props a thinner profile
            and more "bite" with less noise
          Lightweight molded nylon construction reduces rotating mass for
            higher output and longer life
          Reinforcing carbon fibers help maintain true, constant pitch at
            any RPM.

INCLUDES: Two Carbon-Reinforced NYLON Pusher Propeller

SPECS:    Length: 10"
          Pitch:  6"
          Thickness at hub:  1/2"
          Hole diameter:     1/4"