This is a 15x4E Thin Electric Propeller from Advanced Precision Composites.
FEATURES: Gray composite one-piece construction
INCLUDES: One 15x4E Thin Electric Propeller with 0.128, 0.158, 0.197, 0.237
and 0.313" adapter rings
REQUIRES: ALL props require balancing, this is VERY important, use TOPQ5700.
May need prop reamer, use GPMQ5005 (SAE) or GPMQ5007 (Metric)
SPECS: Diameter: 15"
Hub inner diameter: 0.25" (6.35mm)
COMMENTS: For electric use only. Do not use with gasoline or nitro powered