Features: The quiet Hamster Exercise Wheel features a noise reducing design with smooth rolling mechanics, ensuring quiet nighttime use for undisturbed sleep while providing ample space for small pet to stay active. Crafted from durability, nontoxic plastic with rounded edges and slip resistant base, this light weight yet sturdy wheel prioritizes pet safety and easy maintenance without sharps components or complex assembly. Ideal for busy pet owners, multi pet households, and health caregivers seeking reliability exercise solution for hamsters, gerbils, or other small cage dwellings animals. Perfect for bedrooms, home offices, or shared living spaces where noise control and stable placement matter, accommodating pet during both day and night cycles. Combines fitness and enrichment in compacts, promoting natural running behavior through its ergonomic design while resisting wobbling or tipping. Specifications: Color:Four Choices Dimension:12cm/4.72in 15cm/5.91in 17cm/6.69in 20cm/7.87in Component:plastomer Package Includes: 1pc large quiet running wheel note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.