Quiet wheel shake using large diameter ball bearings. Marukan Casa Silent Wheel 25 targets including hedgehogs, degus, Momonga, and Squirrel. This is a quiet spinning wheel with reduced friction noise. The wide and spacious design makes it easy to run, and the rotation is stable. Perfect size for select cages. Contents: 1 piece size (approximate): Width 9.8 x Depth 6.3 x Height 11.6 inches (250 x 160 x 293 mm); Materials: Polystyrene, PP, PC alloy, ABS, Iron, Country of Origin: China