Color as shown Size: 10*10CM Weight: 200g 【QUIET MOTION】: This product consists of: made of non-toxic, bite - and scratch-resistant materials. Abrasion and translucent materials are bright in color, bringing health to pets. The camp at; Innovative ball spins silently. Ensure the Silent Hamster Wheel Rotator slides smoothly and quietly, with no squeaks or rubbing or noise from the bottom bracket. 【NON-SLIP AND FIRM】: The product is designed with non-slip patterns to prevent pets from slipping to protect against slipping. inertia during the race. The side tread on the inner wheel is slightly convex, which effectively increases friction and prevents slipping when running. Edge is defined with rounded edges. More comfortable. The interface loops on both sides of the runner are very stable. 【HEALTHY SPORTS】: Hamster and hedgehog are suitable for 12-inch wheels. 21cm, 31cm wheels are suitable for; most pets. You are on your own when you are away, please buy a toy balance bike to help your