Size: 15cm Absolutely silent Made of untreated natural wood Safe thanks to a walkway with closed bars For safe installation in the cage or outdoor enclosureProduct Colour: beige | Size: 15cm 15cm For the little ones, like B. Striped or dwarf hamsters Recommend a larger size to avoid damage to the hamsters back. Our knowledge for your pet With over forty years of experience in pet supplies and a wide range of 8,000 items, we deliver a wide variety of products to pet lovers around the world with great dedication and skill. Balance bike the optimal fitness equipment for your hamsterThe pendulum supports the natural impulse to run and is therefore the ideal fitness device for your hamster. It consists of completely untreated natural wood and is free of pesticides or other poisons. Thanks to the walkway with closed bars, your hamster can follow his desire to run without any risk of injury. The wheel spins very quietly, so no squealing drives residents crazy. This is especially recommended for safe installation in the cage or outdoor enclosure. It is completely normal behavior for the hamster to urinate into the running wheel while running, suggesting that the hamster likes to run. Urine can penetrate natural untreated wood, which can permanently lead to a penetrating odor. To avoid this, we recommend that you first treat the gangway with a transparent lacquer. This prevents urine from entering and is completely harmless to the animal.