This is a 14x4W Composite Propeller from Advanced Precision Composites. FEATURES: Designed for 3D fun fly applications Gray composite one-piece construction Comes in a bag attached to a header card INCLUDES: One APC 14x4W composite propeller REQUIRES: ALL props require balancing, this is VERY important, use TOPQ5700. May need prop reamer, use GPMQ5005 (SAE) or GPMQ5007 (Metric) SPECS: Diameter: 14" Pitch: 4 Hub inner diameter: 0.30" dew11/11/03 ir/jxs