This is the APC 15.75x13 3-Blade Propeller.
It is a tractor (not a "pusher") prop.

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
"C2" design

INCLUDES: One carbon-reinforced nylon propeller APC 15.75x13 3-Blade Prop

REQUIRES: ALL props require balancing, this is VERY important, use TOPQ5700.
May need prop reamer, use GPMQ5005 (SAE) or GPMQ5007 (Metric)

SPECS: Length: 15.75" Pitch: 13
Thickness at hub: 1/2" Hole diameter: 1/4"