This is the PJA Series 10x5 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 force. Visually examined to ensure trailing edge symmetry
Diameter : 10"
Pitch : 5"
Hole Diameter : 0.31" (8mm)
Weight : .70oz (20g)