The Living World Whisper Spinner Exercise Wheel provides small animals with a safe and quiet outlet for running. Ideal for developing balance and agility while preventing boredom, the Whisper Spinner features a smooth surface and large treads for better grip and comfort as well as a solid back to keep pets from getting trapped. Made from 100% un-treated wood, the wheel is non-toxic and safe to chew. The free-standing Whisper Spinner includes a heavy base to prevent tipping and with completely silent operation due to the ball bearing attachment, the Whisper Spinner is the ideal exercise wheel for any nocturnal small pet. 61737 Whisper Spinner, Small, for Dwarf Hamsters, Mice and Other Small Animals DIMENSIONS: 15 cm L x 9 cm W x 17 cm H (5.9 x 3.5 x 6.7 in)
DIAMETER: Ø 15 cm (5.9 in) 61738 Whisper Spinner, Medium, for Hamsters, Gerbils and Other Small Animals DIMENSIONS: 20 cm L x 9.5 cm W x 22 cm H (7.9 x 3.7 x 8.7 in) DIAMETER: Ø 20 cm (7.9 in) 61739 Whisper Spinner, Large, for Rats, Chinchillas, Hedgehogs and Other Small Animals DIMENSIONS: 29cm Lx 12.5cm Wx 31.5cm H (11.4 x 4.9 x 12.4in) DIAMETER: Ø29cm (11.4in)