Tools Name 325 Carbon Fiber Principal Rotor Blade Jazrider No. JR-HBL-00016 Suitable For Esky EK1H-E013/14 Belt CP, EK1H-E015 Belt-CP (Carbon), Align 450 X / XL / SE / SE V2, HDE, Walkera 39# Helicopter Color Yellow with Ebony Lenght 325mm Width 31mm Grip 5mm Hole Diameter dia. 3.0 mm Fat 48g Material Carbon Dietary Fiber