Features:MATERIAL：Made of high quality wood material, eco-friendly, non-toxic and safe to your pet.EXERCISE TOY：Helps your hamster exercise more and develop balance ability and agility.STURDY SUPPORT：Widened and thickened wood base greatly avoids reversal through providing reliable and stable mount for the exercise wheel.MULTIPLE FUNCTION：It not only serves as exercise toy preferred for small pet sports activities but also as chew toy, offers excellent pet teeth grinding effects.COMPLETELY NOISELESS：The wooden wheel is noiseless, when pets play with this wheel, it will not disturb you, providing a funny place for pets to play and rest.Material: WoodSize:S:15cm/5.91in outside diameter, 14.4cm/5.67in inside diameter, Base width 9cm/3.54in, overall height 17.5cm/6.89in, Running wheel outer width 6cm/2.36in, inner width 5.3cm/2.09inSuitable for small mice such as hamsters, three-wire, silver fox, dwarf, in-laws, etc.M:Medium outer diameter 21cm/8.27in, inner diameter 19.2cm/7.56in, The base width is 12cm/4.72in, the outer width of the running wheel is 8cm/3.15in, the inner width is 7.2cm/2.83in, and the overall height is 23.5m/9.25inSuitable for Shih Tzu bear, tiger bear, golden squirrel, big white mouse, juvenile chinchilla, juvenile mini hedgehog, honey-pocketed mole, etc.L:Large outer diameter 29cm/11.42in, inner diameter 28cm/11.02in, Base width 14cm/5.51in, running wheel width 9.5cm/3.74in, inner width 8.6cm/3.39in, overall height 32cm/12.6inPackage includes:1 X Hamster Roller WheelNote:Please buy a larger model to protect the spine.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-3mm measuring deviation due to manual measurement.Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between dif
