M size dog waterer with a capacity of 500ml. - Brand: Richell - Model: Waterer - Capacity: 500ml - Size: M Purchased on Amazon. I installed it with water once, but it didn't fit my cage, so I'm selling it. It has been opened, so there are some tears in the packaging. Although it is almost unused, it is a used item, so please consider purchasing it with the understanding that it is a used item.