The OUCH! Urethral sounding Plug Set is comprised of 3 phthalate-free high-grade smooth medical silicone dilators, which can be used incrementally for urethral play. They can be used to create immense stimulation and to gradually open up new realms of pleasure. These flexible, textured dilators can produce incredible sensations and help build up strong erections and powerful orgasms. They are ideal for BDSM play and especially for creating medical play experiences. Each of the dilators has a different size and texture for added sensation and a gentle transition from one size to the next. See specifications for exact sizes on the box. The ring pull design offers the security of easy removal. Warning: If not conducted carefully, sounding carries a risk of irritation, tearing of the urethra, or of urinary tract infection.