Designed for rats, guinea pigs and hamsters. Includes same fluid collection tubes and rings as the smaller rodent cages and the following componets sized for larger rodents: upper chamber, water bottle and support, feeder assembly and urine collection tube. Each cage includes complete assembly and use instructions, replacement parts list and warranty card. Modify this cage to house smaller rodents by adding adapter gate Cat. No. N650-0358, plus the following components: For mice: Use adapter gate and mouse kit, Cat. No. N650-0300.