Vac U Lock Attachment Hung Black BxVac U Lock Attachment Ultraskyn Hung Black from Doc Johnson Novelties. Satisfy your craving for size with Ultraskyn Hung from Vac U Lock! Featuring over 12 inches of massive length and 3 inches of incredible girth, Hung offers a dual density life like feel with every detail realistically captured from the plump head, to the bulging veins. Compatible with any Vac U Lock Set, Accessory, as well as O rings, this Attachment includes a Large O ring