Want to get an even larger urethral entrance or fill the big one you may already have?  This stainless steel hollow insert should do the trick. At 3.6 inches (90mm) long, it has just enough depth to fill you up.  The hollow through hole for getting rid of fluids is 3/16" in diameter and large enough to get a high pressure load out it a hurry. :)

If you just want to stretch and increase the size of the opening and inside of the urethral canal, the starting diameter begins with 7.5mm and gradually increases to almost 12mm (1/2").  The 1.1" ID ring makes is a lot easier to remove when you are finished playing.

If you are like most of the visitors on this web site, you will definitely want to electrify this device.  Doing so is easy.  Just attach an alligator clip adapter wire to it and your lead wire and you are good to go as a single-pole electrode.

All the dimensions for this insert are shown below: