This is a 12x6 Slo-Flyer "tractor" (not a "pusher") airplane propeller.
This prop produces a lot of torque even at low speeds. 

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.
Slo-Flyer propellers work well with Electric powered Park Flyer-type
aircraft.

INCLUDES
One carbon-reinforced nylon propeller
One set of small shaft locating rings
One locating ring instruction sheet

REQUIREMENTS
ALL props require balancing (use TOPQ5700)
May need prop reamer, use GPMQ5005 (SAE) or GPMQ5007 (Metric)

SPECIFICATIONS
Length: 12"
Pitch: 6

COMMENTS
Slo-Flyer props are Not designed for Glow or Gas engines