For the Rough and Tough dogs, Made with 100% pure New Rubber. These Rugged toys are built to be tons of powerful fun!! Great for fetching, the rope helps achieve maximum throwing distance. This toy does NOT Squeak! Made with 100% new rubber. Made from the highest quality materials to ensure durability. Do Not let your dog chew on the rope. If you do not intend to use the rope to achieve maximum throwing distance, remove all portions from the toy before allowing dogs to play with the toy. X-Small Grenade measures 1.5" x 1" x 3" - Intended for dogs under 15lbs. Medium Grenade measures 2" x 2" x 5" - Intended for dogs over 15lbs. On the Tuff Scale, this dog toy rates 10 of 10, as in the toughest!