SSND-MRB20
Recommended for open bore options
The SSND-MRB20 is a 20-rib sound with a gently tapered 4.5mm entry tip and a rolling wave of ribs and valleys along its full 13" insertable length, each one gently widening the path for the segments behind it.
Details
- Overall length: 13.4" (340 mm)
- Insertable length: 13" (330 mm)
- Entry tip: 4.5 mm
- 20 progressive rib segments, ranging 7.0–8.5 mm (22–25 Fr)
- Final peak rib: 8.5 mm
- Retention valley: 6.0 mm
- Base: Flared safety flange, 9.0 mm
Zone table
| Zone | Ribs | Diameter | Valley |
|---|---|---|---|
| Introduction | Tip | 4.5 mm | — |
| Initial entry | 1–2 | 7.5–8.0 mm | 7.0 mm |
| Forward transition | 3–9 | 7.5–7.7 mm | 7.0 mm |
| Mid-section core | 10–13 | ~7.5 mm | 6.0 mm |
| Posterior | 14–19 | up to 8.0 mm | 7.5 mm |
| Final expansion | 20 | 8.5 mm | 6.0 mm (retention) |
How it works
The 4.5mm tip enters with minimal resistance, then two initial ribs step up to 7.5–8mm before the diameter eases back slightly through the mid-canal ribs, giving the tissue a chance to relax. Toward the base, the ribs gradually widen again, finishing with a single longer, robust rib that swells to 8.5mm before settling into the final 6mm retention valley.
Choosing your silicone firmness
For a 20-segment column of this length, Bob recommends #10 (Medium) or #18 (Firm).
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
This is a beginner-friendly piece, starting from a 4.5mm tip and building gradually through 7.5–8.5mm wave segments — a good way to try extended-length, textured sounding.
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.
