This was in a lot of NOS parts from a closed Ford tractor dealer. The part # on the tag does not fit the Ford part # profile. My guess is this piece is for a planter. It is made of cast iron and is 6 1/4" in dia. and has a 1" bore w/ 1/4" keyway.. Do your home work before you. buy. I am listing hundreds of NOS Ford tractor and implement parts and I combine shipping so take a look around in my store.