This is a 7x4E Thin Propeller from Advanced Precision Composites.|
For use on electric powered aircraft only (not for glow engines).
Gray composite construction
Comes with two adapter rings that adapt to different motor shafts
One 7x4E Thin Electric Propeller with two Adapter Rings
ALL props require balancing, this is VERY important, use TOPQ5700.
May need prop reamer, use GPMQ5005 (SAE) or GPMQ5007 (Metric)
Hub inner diameter: 0.25" (6.3mm)