Let your Friend have some fun time without aching his/her backbone, With this Loop Exercise Track. Let it be your Hamster, Squirrel, Dwarf, Gerbil or Mice...Nothing can compete with the fun & joy of a Running Exercise Track. Get the best present for your little pet today !!Specifications:* It is designed with a buckle for easy installation and disassemble,convenient for you to store up the toy* The pet toy can effectively control hamster's range of activities in case of accidents.* The hollow design increases the friction so as to evenly dispersed the ball weight.* The product is safe, non-toxic and harmless made of high quality and environmentally friendly material for using without worry