This is a 9x7 Airplane Propeller that is a "tractor" (not a "pusher") Prop.
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.
One Carbon-Reinforced NYLON Propeller
ALL props require balancing, this is VERY important.
May need prop reamer
Thickness at hub: 3/8"
Hole diameter: 1/4"