Thats an A45. In the hands of the right prop doctor and right setup, will be about the fastest prop somebodys bolted on. Thin blades make that a runner. Its wont take a beating like a Tempest Plus – but if fixed right, will be somebodys secret weapon….. Needs to be bolted on a 150 – 175 2.5L. Itll turn like a 24, but be faster. On a 3L theyre prone to crack and lose blades like a Trophy. Thats why they went to the “Plus” series for durability.