This sale is for a Michigan Propeller, black painted aluminum with part number 031066 printed on it. There are no pitch or diameter numbers that I can tell. The measurements in the title were taken from new Michigan Propellers with that part number. One of the blades has a hit that has put a small mark in the metal. It still appears to be sound, but please be aware that this prop is sold AS-IS. Any questions, please ask. Thanks!