Ribbed vibrating dilator This urethral plug has stimulating ridges that the user will feel when inserting, providing an intense orgasm. It has an insertable length of 77 mm. The thickness of the bulbous part varies between 6.5 mm and 8 mm. This vibrating dilator runs on the included 1.5 volts AAA battery which can be inserted through a screw cap on the top. Comes in a luxurious PU leather case.