Prevue Pet Products wire mesh mouse wheel 90011 toy design prevents feet and tails from getting caught while pets are running. Great for providing exercise inside or outside of the cage. The wheel can also be securely hung on mesh cage sides. Available in 4 assorted colors. Measures 4-1/2 inches Long, 2-1/4 inches Wide, and 5-3/8 inches High. Material Non-toxic and pet safe powder-coated steel mesh. This Product/Package Measures: 5.20 in. L x3.90 in W x3.70 in D