SSND-MRBCUBE
Recommended for open bore options
The SSND-MRBCUBE is a 12" sound with a four-sided, squared cross-section instead of a round one — 15 distinct cubed segments with softly rounded edges, giving a different tactile feel from a standard round rib design.
Details
- Overall length: 12"
- Insertable length: 11.75" (298 mm)
- Entry tip: 4.5 mm (14 Fr)
- 15 squared rib segments, each 13–25 mm long
- Relief valleys between segments: 8 mm (24 Fr)
- Retention valley: 7 mm (21 Fr)
How it works
The 4.5mm tapered tip guides in smoothly, then 15 squared ribs — each a slightly different length — pass through in sequence, separated by uniform 8mm valleys that give the canal a moment to relax between segments. The final rib narrows into a 7mm retention valley just ahead of the flange, letting the sphincter muscle settle securely into the groove.
Choosing your silicone firmness
For a multi-segmented piece like this, Bob recommends #10 (Medium) or #18 (Firm) — both keep the squared edges well-defined.
For long-duration wear where you want the segments to feel plush and highly compressible against sensitive tissue, #00-50 (Soft) is also available.
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, a good way to move beyond round rods into a squared, multi-sided texture.
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.
