Doc Johnson Balls Deep 9â Stroker Mouth. Stimulate every last inch with this 9â long Mouth. Featuring stimulating massage beads on the inside for intense satisfaction with a closed-end design for extra suction. Made of UR3, the most lifelike material in the world, this stroker is a happy ending every time! Phthalate-Free, Body-safe, and Proudly Made in America.