SSND-JAS4 13-inch flexible black silicone urethral sound shown horizontally on a grid background from Screenshot 2026-07-02 125743.jpg, highlighting its 10mm egg-shaped entry tip, seven repeating 10mm sensory swells, 8mm sloped valleys, and a prominent 16mm ball safety flange.
SSND-JAS4 urethral sound with egg-shaped tip and 7 sensory ball segments, showing 8-10mm diameter variations along 13-inch length

SSND-JAS4 13"

Regular price$46.50
/
Shipping calculated at checkout.
Color

The SSND-JAS4 13" is a long sound built around seven repeating swells separated by sloped valleys — a continuous wave pattern rather than one taper, designed to give a rolling sensation and warm up muscle walls progressively as it's inserted.

Details

  • Egg-style entry tip: 10.8 mm (0.425", 32.4 Fr)
  • Primary transition valley: 8 mm (0.315", 24 Fr)
  • 7-swell array (each peak): 10.8 mm (0.425", 32.4 Fr)
  • 7-swell relaxation valleys: 8 mm (0.315", 24 Fr)
  • Ball safety flange: 16 mm (0.630", 48 Fr)
  • Overall length: 13" (330 mm)

Choosing your silicone firmness

Bob recommends #10 (Medium) — it keeps the seven swells holding their crisp, repeating shape under muscle pressure for a predictable feel on each pass.

Color options

#18 and #30 are available in pure translucent silicone.
#00-20, #00-50, and #10 use a translucent white base and can be mixed with our standard colors.

Please note

At 8–10.8mm across a full 13" length, this is a good step up from straight rods for users who already have some sounding experience and want to explore deeper, undulating placement.
Use appropriate lubrication and never force insertion. Stop immediately if you experience pain, bleeding, or significant discomfort. Inspect the sound before each use and do not use it if damaged.

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.