Our cheeky little hamster spends a lot of time peering out from this tunnel. She doesn't bother chewing it but loves running in and out and generally just chilling out inside it.

All my Syrians have loved these and really enjoyed shredding them. Some hamsters are on a mission to destroy them as quickly as possible and others take a more gradual approach. With this in mind I would say they last about a week on average once my hamsters have started shredding them but sometimes they just use them as a play tube for a week before they start shredding. They are very safe as only made of corrugated cardboard so no sharp edges or anything. Not really suitable for my robos as just too big for them to chew, I don't know about other breeds of dwarves. Quite big so no good if you have a small cage with limited floor space