This aftermarket blade for the 340mm rotor diameter helis (with folding blades) like the Esky Lama V3/4, Blade CX2/3, Walkera is Made in Germany by Phase-II.
It is the most rigid blade on the market that I tested up to date.
What sets this blade apart from the other "tuning blades" in the market is that it is Carbon Fiber reinforced with CF balls and long CF fibers. It is usually a lot more crash resistant the other blades I know.
Blades are sold as a set with 2"A" and 2"B" blades