The Ancol Tuff Tube is a fantastic and flexible toy that can be changed for repeated interest. The clever tube may be twisted and bent any way you choose giving your pet a strong new tunnel that holds its shape. The Tuff Tube can be expanded up to 75cm and is suitable for small pets including hamsters, rats, and small gerbils. Just 4 Pets tuff tube. Hard tube that can be twisted or bent. 9cm diameter, up to 75cm length (approx.).