SANKO Silent Wheel Flat 17. This is a running wheel for small animals. A sand bath container is also included as a bonus. I bought it for my golden hamster, but it felt too small, so I replaced it with a larger one. I tried it out, but it didn't seem to run well, so I removed it, and it's almost new. The main body has been washed and dried. It's hardly been used, so how about it? I think it's a good size for smaller hamsters like Djungarian and Roborovski hamsters. Also, I replaced the sand bath container, so I'll include it as a bonus. This one has been used a little. It has been washed. It's clean, but it has been used for a short time, so please purchase it with your understanding. For those who have just started keeping hamsters or are considering getting one, how about it? It's a waste to throw it away, so the price is just the shipping and handling fees. No discounts are possible.