This is a set of four APC Propellers 12x3.8 Slow Flyer.
Features: Long fiber composite construction, gray in color
Requires: All props require balancing, this is important. May need prop reamer.
Note: For use with electric motors only. Do not use with gasoline or glow powered engines.
Hub Diameter: 0.50" (12.7mm)
Hub Thickness: 0.30" (7.62mm)
Shaft Diameter: 1/4" (6.3mm)
Weight: 0.63oz (17.9g)