Use ARK's Textured Bite-n-Chew Tip XL to promote a sustained bite and to improve jaw strength and stability. At 2.5 inches total in length (2 inches long when inserted into a Vibe handle), this tip can reach all the way to the back molar area for chewing exercises and/or for sensory input. It can also be used outside the mouth on the cheeks and lips for added stimulation. The cylindrical circumference of each tip has gentle bumps to de-sensitize the mouth and to work on texture acceptance. Each tip is sold individually. Compatible with the Z-Vibe or Z-Grabber (sold separately). Made in the USA, medical grade, FDA compliant, no lead, phthalates, PVC, BPA, or latex. Caution: this therapeutic tool should be used under adult supervision at all times.