Quad-Copter Bundle (9x3.8SF and 9x3.8SFP)
Package contains four propellers (2 standard rotation and 2 reverse rotation)
Use LPAR18SF or LPARM12SF adapter rings
Includes four sets of rings from LPAR18SF and LPARM12SF (3/16", 3mm, 5mm, 6mm,)

Hub Diameter: 0.50 in.
Hub Thickness: 0.33 in.
Shaft Diameter: 1/4 in.
Product Weight: 0.32 oz.
Color: GREY