This propeller is made of Fiber Reinforced Plastics, which is extremely lightweight and durable and It is just designed for 550 RC helicopter .
You can expect an increase in overall motor efficiency with this excellent propeller.
High Thrust
High durable
Extremely lightweight

Fiber Glass 550mm main blades
Suit for RC 30 class helicopter & 550 helicopter
Parameter:
Length: 21.6 Inch/550mm
Material: Fiber Glass
Shaft Hole diameter: 4mm
Product weight: 678g

Package Contents:
3 pair Fiber Glass 550mm main blades