Main blades, the lightest in the world, only 165-170 grams!!! excellent for 3D. Those are Dual Tapered blades 60mm at the root, 48mm at the tip, and also variable profile thickness. This called G2 technology
This gives high Spinning energy, and still excellent  Autorotation performance. MAH blades also very secure, they have a protection when involved in crash, so parts will not fly apart.

Those blades comes with 5mm hole and spacer to fit 4mm bolts.
Thickness 14mm(Possible12mm with shims)