This is a set of four antique industrial cast iron piano casters with round shape and swivel feature. These casters are heavy-duty and were manufactured in the early 1900s, making them a perfect addition to any vintage collection. The patina finish adds to their unique appeal and makes them a conversation starter. The casters are original and were made in the United States, giving them a sense of history and authenticity. They are perfect for those who appreciate industrial style and theme and are looking for a unique piece of furniture to add to their home or office.