Unique Beauty with its smooth, shiny finish, the Black Ice could easily be mistaken for Onyx or glass. The Aneros Progasm is one of the largest members of the Aneros family to the date. It features a newly designed round perineum tab and also boasts a Kundalini "K-Tab" and adds sensations up and down your back that are complementary to the sensations from the prostate. Progasm moves inside the man's body to provide a robust prostate massage for incredible pleasure.