SUPER QUIETThe hamster wheel adopts double ball bearing design, which is smooth and quiet, so your little hamster can enjoy the happy running time. Even if the hamster spins fast on the racing wheel, brings you a quiet night. REASONABLE SIZES diameter is 7.9 inches, L diameter is 10.5 inches. The wide hamster running track allows hamsters to relax their backs while running, enjoy a pleasant running time, and help them exercise and maintain their physical and mental health. ESSENTIAL HAMSTER ACCESSORIES The hamster running wheel is one of the essential hamster accessories in the hamster cage. Your little hamster will like this hamster toy very much. He has to run wildly over it every day to break the logistics and enrich their night, keep it. They are healthy and happy. ADJUSTABLE HEIGHT AND STURDY BASE The height of the hamster wheel can be adjusted up and down. The variable height is between 1 inch (approx. 2.5 cm) and 4 inches (approx. 10 cm) in lower height. You can also remove the base and install the rolling wheel on the hamster cage wire. You can choose the base flexibly or install it on the hamster cage. DURABLE HAMSTER TOY hamster running wheel is made of high quality acrylic and plastic materials. Candy color matches your hamster cage. The transparent base is plush and the solid base allows for reliable position and support.