Use the Knobby Tube™ for clients who crave sensory input to the mouth and jaw. The Knobby Tube™ contains small, round, textured bumps on the stem to provide extra tactile input when placed in the mouth. The Knobby Tube™ is safe, washable, non-toxic, and latex-free. Simply present the Knobby Tube™ stem (12 mm) laterally into your client's mouth near the molars and encourage biting. Each Knobby Tube™ has a grooved handle so the tube will not go too far back in the client's mouth. Stem is 3", handle is 2 3/8".