These are wheels that were actually used on a miniature SL (steam locomotive) 40 years ago. Made of cast iron. Outer diameter 250mm, weight approximately 2.8kg/piece. A rare and unique item that's hard to find. Please use them for design displays at school festivals and cultural festivals. I think they would make a retro object if you polish them and paint them. They can also be used as weights to secure tarps and tents when camping. Please judge the condition from the photos. Thank you.