This is a Mercury QSS collection propeller component number 48-16322-25. It is 13 3/8" dimension and 25 pitch. I have re-powered my watercraft and this is not required. When we checked it out, I brought this as my spare prop with the various other electric motor and I simply used it once. Besides that is was merely in the storage compartment. It is in excellent shape. Asking $250 OBO