Enhance your helicopter's performance with these 550mm universal fiberglass main rotor blades. Designed to reduce noise and power loss, these blades provide stable flight and exceptional durability. Crafted from high-quality fiberglass, these blades are strong and resistant to crashes, ensuring long-lasting use. Experience smoother flights, reduced noise, and improved control. Perfect for helicopter enthusiasts of all levels, these universal main rotor blades are a must-have accessory for anyone looking to enhance their flying experience. Whether you're practicing in an open field, these main rotor blades will deliver stable and reliable performance, making every flight memorable. Specifications: Material: Fiberglass Total Length: Approximately 568mm/22.36 inches Tip to Hole Length: Approximately 550mm/21.65 inches Paddle Width: Approximately 53mm/2.09 inches Root Thickness: Approximately 12mm/0.47 inches Aperture: Approximately 4mm (with brass sleeve) Package Includes: 1 pair of 550mm main rotor blades