<https://www.apcprop.com/product/b9x6sf/#product>
<http://schema.org/description>
"Slow Flyer\nUse LPAR18SF or LPARM12SF adapter rings\nIncludes one set of rings from LPAR18SF\nThe material is the same fiberglass composite used in our grey props, just the color is black"
<https://www.apcprop.com/product/b9x6sf/>