SSND-RNDMBALL 10-13
Recommended for open bore options
The SSND-RNDMBALL 10-13 was built directly from customer requests for a larger-diameter sound with a shifting, irregular node pattern rather than a steady taper — spherical sections and longer tapered barrels alternate, so the diameter keeps changing along the length. Available in two lengths: 8" (12 nodes) or 17" (22 nodes).
Details
- Entry tip: 10 mm, on both lengths
- 8" model: 12 nodes, peaking at 13.2 mm (segment 9), insertable depth 8"
- 17" model: 22 nodes, peaking at 13.3 mm (segment 20), insertable depth 16.5" (419 mm)
- Final ball before flange: 13.1 mm
- Retention valley: 9 mm
| Segment | Diameter | Segment | Diameter |
| 1 | 10.0 mm | 12 | 12.0 mm |
| 2 | 12.0 mm | 13 | 11.8 mm |
| 3 | 12.5 mm | 14 | 13.0 mm |
| 4 | 11.5 mm | 15 | 13.0 mm |
| 5 | 12.2 mm | 16 | 13.0 mm |
| 6 | 12.5 mm | 17 | 12.2 mm |
| 7 | 12.5 mm | 18 | 12.5 mm |
| 8 | 13.0 mm | 19 | 13.0 mm |
| 9 | 13.2 mm | 20 | 13.3 mm |
| 10 | 12.7 mm | 21 | 12.7 mm |
| 11 | 12.8 mm | 22 | 13.1 mm |
The 8" model uses segments 1–12; the 17" model uses all 22.
How it works
The 10mm tip leads into a sequence of nodes that shift constantly in size rather than following a steady taper — some segments step up, some ease back — giving continuously varied feedback rather than one predictable rhythm. The final ball narrows into a 9mm retention valley just ahead of the base flange, letting the entry muscle close naturally around the groove.
Choosing your silicone firmness
Bob recommends #00-50 (Soft) — with segments peaking above 13mm, it lets the wide sections compress under muscle pressure for a comfortable, low-fatigue stretch.
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 an advanced piece, particularly in the 17" configuration — intended for users who have already mastered standard intermediate sizes.
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.
