[4 in 1 Design]The multifunctional hamster house is designed to meet all needs of small animals, both practical and entertaining. It contains hamster wheel, automatic drinking bottle, hideout and food bowl. Perfect size for hamster, dwarf hamster, small mice, gerbil and other little animals. [Safe Material]Made of food-grade plastic and stainless steel, environmentally friendly material, BPA FREE to promise a safe drink for your little friend, odorless, easy to clean. [Quite Running Wheel]The wheel's diameter is 20cm and the runway's width is 2.8 inch. Silent Hamster wheel brings your little hamster endless running happiness, also brings you a quiet night even if your hamster on the race track to run & hamster wheel is spinning. [5.3oz/150ml Water Bottle]Please check the small animal water bottle daily and after each refill, tap the metal ball at the tip of the spout to ensure proper flow of water. The water bottle is ready to use when bubbles appear when you tap the metal ball. [Hamster Hideout]Why do hamsters need shelter? Hamster shelter can create a relatively dark area, reduce the interference of strong light to hamster, conform to the habit of hamster's nocturnal travelling, and help hamster rest at ease. Color:Green Material: Plastic Package Contents: 1 x Hamster Exercise Wheel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.