FUNKEY 550mm CARBON REINFORCED FIBREGLASS BLADES SILVER 30 SIZESpecifications: Length: 550mm Grip Thickness: >12mm Width: 51mm Hole: 3-4mm Airfoil: Symmertical Tip: Curved Common Application: 30 size RC Helicopters, 50 size Multi-Bladed RC Helicopters Features: Carbon Fiber Composite Precisely Balanced Supreme Performance Blades you can rely on