Living World Plastic Guinea Pig/Ferret Exercise Ball with Stand, 11-2/5-Inch Reversible argyle raincoat Simply place your pet inside the exercise ball for safe, interactive and healthy activity, and be sure to monitor your pet closely The exercise ball is made from non-toxic, non-breakable, clear plastic and is well-ventilated to ensure continuous air circulation Available in large size Measures 11-2/5-inch diameter