This is an authentic grinding stone nominally 18” in diameter, 2” wide and weighs slightly over 47 pounds. It has the axel hardware attached. I took this off an antique peddle type grinding wheel and it is exactly as I found it. I have the cast iron seat (it looks like a miniature tractor seat) from the grinding machine listed separately. Please look at all of the pictures because they are part of the description and include dimensions and weight. Shipped via UPS.