The Aneros Progasm is one of the largest members of the Aneros family to date. It features a newly designed round perineum tab and also boasts a Kundalini K-Tab. The K-Tab adds sensations up and down your back that are complementary to the sensations from the prostate.- Tip Width: 1.25- Mid-Ridge Width: 1.30- Stem to Perineum Distance: 1.52- Insertable Length: 4.5Mobility is a key to success with our products. and despite its size the Progasm moves inside the man`s body to provide a robust prostate masssage for incredible pleasure.