ARK'S Z-Vibe® is a VIBRATORY tool constructed of a durable, textured, aluminum handle and sturdy, medical grade plastics. Mainly used for oral motor stimulation and sensory input, it can also be used outside the mouth on the cheeks, lips, and neck. Even though it is only the size of a ball point pen, the Z-Vibe® and its various tips provide a vast range of sensory stimulation. Various tips of different shapes and sizes provide gentle vibrations to stimulate the gums, palate, lips, cheeks, and tongue. The Z-Vibe® is sold with one probe tip, other tips sold separately.