Description:This is a great wheel roller for your pet hamster to do exercise or enjoy itself when youre out. Made of high quality material, its sturdy and durable. All finishes are non-toxic, safe and Eco-friendly. Anti-slip design, safe for the hamster to run.Features: Made of high quality material, sturdy and durable. All finishes are non-toxic, safe and Eco-friendly. Anti-slip design, safe for the hamster to run. Easy to install and clean. Great wheel roller for you hamster to do exercise or have fun by itself.Specification:Material: PlasticColor: Blue / Pink(Optional)Size: 18 x 18 x 11cm / 7.09 x 7.09 x 4.33inch(Approx.)Package Included:1 x Wheel spinner 1 x BaseNotice:Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.1¡¢Made of high quality material, sturdy and durable. 2¡¢All finishes are non-toxic, safe and Eco-friendly. 3¡¢Anti-slip design, safe for the hamster to run. 4¡¢Easy to install and clean. 5¡¢Great wheel roller for you hamster to do exercise or have fun by itself.