Speed 400 Propeller,5.5 x 4.5
APC 5.5 x 4.5 Propeller This is a 5.5x4.5E thin composite propeller from Advanced Precision Composites. For use on electric powered aircraft only (not for gas engines).Diameter: 5.5" Pitch: 4.5" Hub inner diameter: 0.25" Gray composite propeller blades that assemble onto a propeller hub. Comes with two adapter rings that adapt to different motor shafts.