Sleek, mirror-smooth, and engineered with millimeter precision: the
E-Stim Systems UltraSound Smooth combines a classic urethral dilator—also known as a “sound”—with the capability for electrical stimulation. This long stainless steel electrosound is available in four diameters—
6, 8, 10, and 12 mm—so you can choose a size that suits your experience and preferences.
Each version is 175 mm long and is crafted from solid stainless steel in the E-Stim Systems workshop in the United Kingdom. The surface is then hand-polished to a mirror-smooth finish. At the front, the sound gradually widens over the first 20 mm to reach its full diameter. At the rear, deep grip grooves provide a secure hold, while an integrated
4 mm socket transforms the UltraSound from a classic metal sound into a monopolar e-stim electrode.
UltraSound Smooth: Smooth from Tip to Shaft
Within the UltraSound family, the
Smooth is the long version without the measurement grooves found on the Dipstick. The shaft is smooth and polished to a high gloss, with a rounded, tapered tip at the front.
That taper isn’t just a matter of design. The first 20 mm gradually widens to the selected nominal diameter. The difference between the tip and the shaft is 2 mm. For example, in the 10 mm version, the taper begins at around 8 mm and gradually increases to 10 mm.
This prevents an abrupt transition to the full diameter. The design functions more like a metal ramp than a sudden threshold—subtle in form, but a crucial detail for a precision product like this.
Four diameters: 6, 8, 10, and 12 mm
The
E-Stim Systems UltraSound Smooth is available in four diameters. All variants have the same total length of 175 mm and the same design. The difference lies in the diameter: The step between each version is therefore always 2 mm. That may sound modest on paper, but in urethral dilation, a difference of just a few millimeters can be significant. Therefore, never automatically choose a larger size just because it seems more challenging. The correct diameter is the size that fits comfortably based on your own experience, without forcing it.
- 6 mm: the slimmest UltraSound Smooth, with a taper that starts around 4 mm and increases to 6 mm.
- 8 mm: an intermediate size with a taper from approximately 6 to 8 mm.
- 10 mm: a more substantial version that increases from approximately 8 to 10 mm over the first 20 mm.
- 12 mm: the thickest Smooth variant, with a gradual transition from approximately 10 to 12 mm.
175 mm long for all four versions
Unlike the shorter MicroSounds, the Smooth UltraSounds have a total length of 175 mm. According to E-Stim Systems’ current product specifications, the maximum insertable length is approximately
165 mm.
Of course, you don’t have to use the full length. The long, uniform shaft actually gives you the freedom to control just how far the sound is inserted. Especially with urethral use, millimeters can sometimes mean more than centimeters.
Solid stainless steel with a mirror-smooth finish
E-Stim Systems manufactures every UltraSound Smooth from
solid stainless steel. The sounds are produced in the company’s own workshop in the United Kingdom and then individually hand-polished to a mirror-smooth finish.
That smooth surface serves an important practical function for a urethral dilator. There are no decorative ridges along the shaft that add extra texture during insertion. Those specifically looking for such grooves can check out the UltraSound Dipstick within the same product family.
Deep grooves are only present on the rear section. These are intended as a
grip zone for the fingers. This is useful when sterile lubricant turns the otherwise mirror-smooth steel into something that’s about as easy to grip as a wet bar of soap.
Monopolar: a second contact point is necessary
The UltraSound Smooth has, at its core,
a single 4 mm socket. This makes it a
monopolar e-stim electrode. This means that the sound forms a single electrical contact point and cannot complete a circuit on its own.
Therefore, electrical stimulation always requires a
second suitable contact point. E-Stim Systems recommends, among other things, a conductive rubber loop, a suitable electrode, or a self-adhesive pad.
The type of cable you need depends on the combination. With two 4 mm connectors, a suitable 4 mm cable can be used. If the second contact point is, for example, a 2 mm conductive loop or pad, the E-Stim Systems BiCable can be a practical solution.
A cable and second electrode are not included as standard with the UltraSound Smooth.
Which size of UltraSound Smooth should you choose?
With sounds, bigger isn’t automatically better. The manufacturer deliberately offers four diameters so users can choose a suitable size and, if necessary, gradually work their way up.
The
6 mm is the thinnest Smooth in the series. Next come 8 and 10 mm in 2-mm increments. The
12 mm is the thickest option in this series and is intended for experienced users who can handle this diameter without straining.
If you’re unsure about the right size, it’s better to err on the side of caution. E-Stim Systems itself emphasizes that users often choose a diameter that’s too large for sounds. A sound should never be inserted with force.
Hygiene is essential for urethral use
With urethral toys, thorough hygiene is no afterthought. E-Stim Systems recommends
carefully cleaning the UltraSound immediately before use, using an alcohol wipe, for example.
In addition, use a
sterile lubricant suitable for urethral use. Do not use anesthetics to mask discomfort. Pain, noticeable resistance, irritation, or bleeding are signs that you should stop immediately.
Wash your hands thoroughly before touching the cleaned sound, and ensure that the part to be inserted does not come into contact with uncleaned surfaces again after cleaning.
Cleaning: Solid stainless steel can be boiled
After use, the UltraSound Smooth can be cleaned with warm water and a mild detergent or a suitable sterilizing solution. Because the sound is made of
solid stainless steel, E-Stim Systems states that it can also be safely boiled.
Allow the sound to dry completely before storing it. Pay special attention to the 4 mm connector in the base; this must also be dry before the electrode is reconnected to a cable.
Using E-stim with the UltraSound Smooth
If you want to use the sound as an electrode, first connect the required cable and the second contact point while the e-stim controller is turned off. Check all connections before turning on the power box.
Start with the intensity set to the lowest level and then gradually increase it. Due to its placement, the UltraSound has very direct electrical contact, so careful adjustment is important. Use only suitable e-stim equipment and follow the safety instructions provided by the manufacturer of the controller you are using.
General Features
- Brand: E-Stim Systems
- Series: UltraSound™
- Model: Smooth
- Type: urethral dilator / sound / electrosound
- Available in 6, 8, 10, and 12 mm
- Total length: 175 mm
- Maximum insertable length: approximately 165 mm
- Material: solid stainless steel
- Hand-polished to a mirror finish
- Smooth shaft without Dipstick measurement grooves
- Rounded, tapered tip
- First 20 mm gradually tapers to full diameter
- Difference between tip and shaft: 2 mm
- Milled grip grooves at the base
- Monopolar electrode
- Connection: 1 × 4 mm socket
- Second electrical contact point required for e-stim
- Cable not included
- Suitable for thorough cleaning
- According to the manufacturer, solid stainless steel can be boiled
- Manufactured in the United Kingdom
- Lifetime E-Stim Systems warranty for the original purchaser, subject to warranty terms and conditions
Size 6 mm
- Shaft diameter: 6 mm
- Taper at the tip: approximately 4 to 6 mm
- Total length: 175 mm
- Insertable length: approximately 165 mm
Size 8 mm
- Shaft diameter: 8 mm
- Taper at the tip: approximately 6 to 8 mm
- Total length: 175 mm
- Insertable length: approximately 165 mm
Size 10 mm
- Shaft diameter: 10 mm
- Taper at the tip: approximately 8 to 10 mm
- Total length: 175 mm
- Insertable length: approximately 165 mm
Size 12 mm
- Shaft diameter: 12 mm
- Taper at the tip: approximately 10 to 12 mm
- Total length: 175 mm
- Insertable length: approximately 165 mm
FAQ
What sizes are available for the E-Stim Systems UltraSound Smooth Electrosex Dilator?The UltraSound Smooth is available in diameters of 6, 8, 10, and 12 mm. All four versions are 175 mm long and, according to E-Stim Systems’ current specifications, have a maximum insertable length of approximately 165 mm.
Is the E-Stim Systems UltraSound Smooth Electrosex Dilator bipolar?No. The UltraSound Smooth has a single 4 mm connector and is a monopolar electrode. Therefore, a second suitable electrical contact point is required for electrical stimulation, such as a conductive loop, pad, or other compatible electrode.
What is the difference between the E-Stim Systems UltraSound Smooth Electrosex Dilator and the Dipstick?The Smooth has a completely smooth, long shaft. The UltraSound Dipstick also features grooves spaced 20 mm apart. These provide a visual indication of the depth used and add extra surface texture. Both series are available in 6, 8, 10, and 12 mm.
How do I clean the E-Stim Systems UltraSound Smooth Electrosex Dilator?Clean the dilator thoroughly with warm water and a mild detergent or a suitable sterilizing solution. According to E-Stim Systems, the solid stainless steel can also be boiled. For urethral use, the manufacturer also recommends cleaning the dilator immediately before use and using sterile lubricant. Allow the dilator and the 4 mm connector to dry completely after cleaning.
The
E-Stim Systems UltraSound Smooth leaves little to chance: four carefully selected diameters, solid mirror-polished stainless steel, and a 4 mm connector for electroplay. From the slender 6 mm to the substantial 12 mm, you decide which size suits your experience. We’ll ship your chosen model quickly, carefully, and in completely discreet packaging.
