ChuBuddy tubes are made from an NSF 61 compliant, non-toxic material that is BPA-free, phthalate-free, latex-free and lead-free. They also come with an 8" tether that makes it easy to attach to clothing and makes it harder to lose! Clip the Buddy tube on or wear as a bracelet. ChuBuddy tubes are made for moderate to aggressive chewers. The Buddy tube is 1/2" in diameter and is an ideal chew for children with autism and other sensory needs.