This is a 15x4W Thin Composite Propeller from Advanced Precision Composites.
Designed for 3D Fun Flying.
FEATURES: Gray composite one-piece construction.
Comes in a bag attached to a header card.
INCLUDES: One APC 15x4W composite propeller
REQUIRES: ALL props require balancing, this is VERY important
SPECS: Diameter: 15"
Pitch: 4
Hub inner diameter: 1.4"