Align T-Rex 550DFC/550L/550X 3-Bladed Main Rotor Head Set. Product: Product: Product: Package: Instruction: Specification: Suitable for T-REX 550/600For T-REX 550E and T-REX 600, must use with 600DFC Main Shaft Set. The new 550E Three-Blade Rotor Head is specially made from 3-D rotation surface process, as well as aerospace grade aluminum alloy, strongly enhance structural toughness […]