I am very glad I bought this tunnel for my little mouse like the Chinese hamster (with a 1 inch tail). The holes are big enough for her to fit through and the wood is very nice and soft. There weren't any splinters on it at all and it appears it will tear, not splinter. I think it's a very safe toy and she likes it a lot. The holes are a bit small for my Russian dwarf hamster, so if your dwarf hamster isn't exactly small, take a good look at the hole sizes. I think robots, mice, chinese hamsters and little russians/campbells will do, but my little one is a bit chubby and I think he might get stuck in it.
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