Specification: Origin: Mainland China Material: Wood Size: S: Outside Diameter:15cm/5.91in Inside Diameter: 14.4cm/5.67in Base Width: 9cm/3.54in Overall Height: 17.5cm/6.89in Running Wheel Outer Width: 6cm/2.36in, Inner Width: 5.3cm/2.09in Suitable For Small Mice Such As Hamsters, Three-Wire, Silver Fox, Dwarf, In-Laws, Etc. M: Outer Diameter: 21cm/8.27in Inner Diameter: 19.2cm/7.56in Base Width: 12cm/4.72in Overall Height: 23.5m/9.25in Running Wheel Outer Width: 8cm/3.15in, The Inner Width Is 7.2cm/2.83in, Suitable For Shih Tzu Bear, Tiger Bear, Golden Squirrel, Big White Mouse, Juvenile Chinchilla, Juvenile Mini Hedgehog, Honey-Pocketed Mole, Etc. L: Outer Diameter: 29cm/11.42in Inner Diameter: 28cm/11.02in Base Width: 14cm/5.51in Overall Height: 32cm/12.6in Running Wheel Outer Width 9.5cm/3.74in, Inner Width 8.6cm/3.39in Note: 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. 1 x Hamster Roller Wheel |