The best-selling Aneros Helix is aggressively shaped and angled, providing immediate pressure and tension on the prostate and surrounding area. It requires less patience and practice to realise benefits.PRODUCT SPECS:Tip Width: 2.4 cm (0.95 inches)Mid-Ridge Width: 2.1 cm (0.825 inches)Stem to Perineum Distance: 3.8 cm (1.5 inches)Insertable Length: 10.16 cm (4 inches)