First off, although it can be VERY enjoyable for some folks, urethral penetration (sometimes known as sounding or catheter play) is not something anyone should go into without lots of prior research, time, patience and some high quality tools. Please do lots of reading up before putting anything into your urethra! As for those high quality tools we mentioned, we've got you covered. Example: the 105mm Bumpy Silicone Urethral Sounding Probe from Shots' Ouch! collection.
In flexible silicone, the hollow Plug features a smooth tip and three uniform (and namesake!) bumpy swells. A sturdy 1.4"/36mm ringed handle makes insertion, removal, and any tugs and twists you might want to carry out easy and perfectly controlled.
Always follow a meticulous cleansing routine before and after using any urethral penetration device. The Silicone Urethral Sounding Plug's hypoallergenic silicone material can be very thoroughly cleaned - something you definitely want in any urethral device. Always use the highest quality lube with any tool that'll be entering our or your partner's urethra - the best option is a sterile surgical or medical grade water based formula..
*The Plug is approximately 4.1"/105mm in total length and .31"/8mm at the tip.