The Aussie Dog Enduro Ball is the ultimate hard wearing tough ball that will not pop, shatter or crack. It is thick, durable, has an internal rattle and is totally safe for alone play as long as the Enduro ball cannot fit completely inside your best friends mouth as a safety precaution do not buy a ball that can completely fit inside their mouth! The 190mm MEDIUM Enduro Ball is designed for 10kg 30kg dogs. Aussie Dog back it with a 12 month warranty (Australian purchases only, warranty except Staffie Breeds they need to sniff out the genuine Aussie Dog Staffie Ball instead).