This is the PJA Series 18x6 Beechwood Propeller from Xoar International.
Constructed of top-grade German beechwood
Balanced during every stage of production
Production process and measurement is certified to conform to aero
sport equipment standard
Processed from hub to tip minimize air resistance and balance air
Visually examined to ensure trailing edge symmetry
Xoar International 18x6 Propeller
Balancing before use, see COMMENTS
Hole Diameter: 0.31" (8mm)
Weight: 2.53oz (72g)
Final balance check is suggested before flight due to external
factors such as temperature. Handling during transit may vary the
balance of the propeller.