HD550BZ 550 Carbon Fiber BladesProduct: Package: Instruction: Specification: B grade product. Suitable for T REX 550E 550X. The 550 3G main blades are designed specifically for extreme 3D flying, featuring both high agility and excellent stability characteristics. The blades have brand new airfoil design, coupled with new painted graphics. In addition, the blades rigidity have been increased for better anti torsion characteristics during flight. The new airfoil design effectively