This short type is so you can enjoy the deep feeling. The quick short stroke makes it possible to poke the large protrusion set into the deepest point and stimulate the cup. The details have been redesigned while the tightening of the curve-shaped shape and strong suction power. Give this opportunity to experience the deepest feeling that evolved by a bold renewal.This product is designed to be about 1.4 inches (35 mm) shorter than the regular size cup series, but it is not a cup for those with smaller sizes. Even those who feel regular sized cups just right, this cup series is designed to provide ample enjoyment.