You are looking at 2 New Sets of Main Blades/Propellers for UDI U818A U817 U817C U817A  Quadcopter/Drones 

Spare Part 

  • Genuine UDI propeller blades consist of the same durable material as the ones on your original drone
  • Compatible drones for these blades include the U818A, U818A-1, U818A HD and U817A RC quadcopter
  • Use brand new, manufacturer-recommended spares to avoid compatibility issues and enjoy long-term use
  • This crash kit includes 2 full sets of UDI spare blades; 8 Pieces