Medium Diamond Penis Plug Monopole Electrode

TL;DR: if you want to do urethral estim, buy this.

A fantastic urethral plug that's great for newbies and the more experienced alike. It's comfortable, hygienic, and gives great sensations - without the drawbacks of many other designs. It also comes in several sizes, so there's something to fit everyone.

One of the drawbacks of urethral sounding is the risk of infection.
As it's made of stainless steel, this urethral plug is easy to sterilise; and it's fairly short length further reduces the risk of infection (the deeper you insert anything down the urethra, the greater the risk of infection).

Another drawback of urethral insertables is that they have a tendency to work their way out, often abruptly. But the diamond-shaped nature of this plug reduces that tendency. And if you feel like you need more security then Joanne makes a diamond plug version of her "Sound Clamping Monopole Glans Electrode", which I can also recommend.

The sensations this plug generates are brilliant: it spreads the contact area throughout the end of the urethra and also a little on the glans adjacent to the urethral opening, which gives rise to sensations throughout the whole of end of the penis. This feels great regardless of whether you like the gentle and subtle sensations of low power stimming or more intense high power pain play.