Description: Item type: Pet Jogging Ball Application: Home Office Outdoor lawn Garden or Travel. Function1: Allows the Hamster to mix play and exercise enjoyable and help it keep fit and in good shape. Function2: This ball can also be as cage to carry pet out. Ball size: 10cm/3.94 (Diameter) Gross weight: 39g Color: Pink/Yellow/Blue/White (Optional) Style: Cute Pattern: With Multi Holes Shape: Ball How to Use: Doors unlock by twisting anti-clockwise and then Put your pet in. Suitable For: Ideal for hamsters gerbils mice or other small animal. Material: Plastic Package included: 1x Pet Rodent Mice Jogging Ball Please contact us first when you have any problem we will give you the best service and solve the problem ASAP.Thank you so much.