Haven't taken them out to assemble, but a quick shot of foldable & ultra light. The Foldable looks identical to the standard Xoar Blade in shape & thickness, the Ultra light is very light and has an sharp checker board pattern. The foldable blades have a brass bushing and the kit includes a 2nd size to fit the motor's shaft.how close do the folding ones fold together
The foldable links are 1.5" center to center spacing. Not sure if that answers your question or how it compares. I'll asmb the blades tomorrow for additional measurements on foldable.

