I used this when I had a hedgehog. I used the running wheel by fixing it to the stand with screws. I haven't tried it, so I don't know if it can be fixed directly to the cage. The running wheel has some scratches, but there are no cracks, breaks, or chips. This is stored and inspected by an amateur. Please refrain from purchasing if you are sensitive to such things. I have a dog and an parakeet. Please be aware if you have allergies. I will recycle cardboard boxes and other packing materials I have at home. P.S. The fixing position in the second photo can be set one level higher.