The Red Chewy Tube is typically used with toddlers, older children and adults to provide a smooth surface for practicing biting and chewing skills. It features a hollow stem of 1/2″ OD. Red, smooth, large-stemmed, T-shaped, tubular For chewing and biting skills, TMJ stimulation, eliminating teeth grinding… Integrated in the Bite Tube Set and in the “Jaw Book” Reusable, durable and easy to clean Non-toxic, FDA compliant, free of latex, lead, PVC and phthalates