Ouch Silicone Vibrating Bullet Plug Extra Long Urethal Sounding Black from Shots Toys. Ouch! Introduces a new line of toys for urethral explorers! If urethral sounding is your kink, then let these smooth probes deliver the ultimate pleasure! The urethra is lined with super sensitive nerve endings, which can be extremely pleasurable when stimulated. Additionally, deep urethral play is the only way to directly massage the prostate. Ouch! Has a variety of urethral sounding probes for beginners as well as advanced users! This super long vibrating model is very flexible and the rounded tip allows easy insertion. The probe has a single vibration mode going up to a staggering 12,000 rpm but is ultra quiet at less than 50dB. It takes one AAA battery, included. Made from super smooth medical grade, phthalate free silicone, the toy has a total length of 17.7 inches, an insertable length of 13.41 inches and a diameter of 0.2 inch.