This is a 13x6.5E Electric ONLY Composite Propeller from Advanced Precision Composites FEATURES: Gray composite one-piece construction Comes with five adapter rings that adapt to different motor shafts Comes in a bag attached to a header card INCLUDES: One composite propeller Five composite adapter rings REQUIRES: ALL props require balancing, this is VERY important, use TOPQ5700. May need prop reamer, use GPMQ5006 (SAE) or GPMQ5007 (Metric) SPECS: Diameter: 13" Pitch: 6.5 Hub inner diameter: 0.25" cdh8/26/03 ir/jxs