This is the APC 7×4 Free Flight Airplane Propeller.
FEATURES
Lightweight injection molded nylon construction reduces rotating mass
for higher output and longer life
Reinforcing carbon fibers help maintain true, constant pitch at any
RPM.
Gray in color
INCLUDES
APC 7×4 Free Flight Airplane Propeller
SPECIFICATIONS
Length: 7″
Pitch: 4″
Hub Thickness: 0.40″ (10.1mm)
Hole Diameter: 0.18″ (4.5mm)