Recommended Blades and Battery"s size for Heli Setups Product: Package: Instruction: Specification: Use for T-REX 600/600 Nitro。 3K carbon fiber made, new light-weight design, improve the efficiency of tail blade to make more precision on tail rudder control. Shape: Symmetrical wing Length: 95X28mm Width: 4.9mm Shaft Diameter: 3mm Weight: 8.5g/set