High Quality Material: This Hamster Racing Wheel Is Made Of High Quality Eco-Friendly Boards And Wood-Plastic Panels. It Provides Reliable Position And Support When Running Or Walking, Allowing Your Hamsters To Run Endlessly, Maintain Happiness And Sanity. Quiet Design: The Hamster Wheel Bearing Is Equipped A Silent, Extremely Quiet Skate That Does Not Wobble And Is Efficient And Smooth. Even If Your Pet Walks Around At Night, No One Will Be Disturbed. Solid And Non-Slip: The Hamster Wheel Is Not Easy To Fall Off After Installation And Is Safer To Use. It Can Easily Be Inserted Into The Pet'S Cage. Non-Slip Design Prevents Your Pet From Slipping And Getting Hurt While Walking And Playing. Wide Range Of Uses: This Pet Exercise Bike Is Designed For Chinchillas, Gerbils, Hedgehogs , Mice And Other Similar Small Animals, And Helps Entertain And Exercise All Animals To Keep Them Happy And Healthy. Package Includes: The Package Contains 14 Pieces Including 1 Hamster Paddle Wheel And 13 Accessories, The Accessories Include 2 Round Washers, 3 Screws, 3 Nuts, 1 Shofar Nut, 2 Triangle Pieces And 1 Screwdriver, 1 Bearing Piece.