This is a 14x10 Electric Propeller from Advanced Precision Composites FEATURES: Gray composite one-piece construction Comes in a bag attached to a header card INCLUDES: One 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: 10 Hub inner diameter: 0.25" (6.35mm) ajw 7/18/04 ir/jxs