Ouch Urethral Sounding Vibrating Bullet Plug Black from Shots Toys. Discover a new way to play with the Ouch! Urethral sounding Vibrating Plug. The textured flexible plug slips into your urethra with ease to stimulate an array of highly sensitive nerve endings, which often get overlooked. The plug has an insertable length of 4.73 inches with a textured ribbed surface and a diameter of 0.20 inch while the tip has a diameter of 0.32 inch. The ring, for easy extraction, holds the vibrating bullet with a onetouch on/off button. Vibrator requires 1 AG13/LR44 battery. Battery included. Warning: If not conducted carefully, sounding carries a risk of irritation, tearing of the urethra, or of urinary tract infection.