SSND-MRB 8-12mm
- In stock, ready to ship
Recommended for open bore options
Featuring a multi-contoured profile designed for deliberate progression and high-density stimulation, the SSND-MRB 8-12mm utilizes 19 separate elliptical-shaped ribs separated by deep hold-in-place sizing valleys. Classified in the Intermediate experience tier (12mm peak diameter and 14.5" insertable length), this sound provides stepped tactile feedback across the entire length of the canal. Available in both solid-core and 3/32" hollow open-core configurations, the open option allows for fluid drainage or breathability during extended wear.
Anatomical Sizing & Mechanics
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Tapered Entry Profile: Begins with an initial 12mm rounded elliptical rib designed to initiate gradual expansion upon entry.
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Graduated Ribbed Body: Features 18 additional elliptical ribs (measuring 11mm to 12mm in diameter and 15mm to 17mm in length) separated by narrow valleys (8mm–9mm diameter, 3mm–4mm length) for continuous textural feedback.
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Targeted Retention Valley: Incorporates a dedicated 8mm retention valley positioned directly in front of the base to securely anchor the piece during wear.
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Flared Safety Base: Terminates at a 1/2" (16.5mm) flared flange to serve as a stop mechanism for safe positioning and retrieval.
Anatomical Depth Guide With an insertable shaft length of 14.5" (368mm), the SSND-MRB 8-12mm provides deep canal reach, advancing past the prostatic urethra and bladder neck into the upper canal. Operating within the 10"–14.75" range, it delivers full-length coverage while remaining accessible to experienced intermediate users.
Dimension & Sizing Profile
| Segment / Feature | Outer Diameter (mm) | French Sizing (Fr) |
| 1st Rib (Entry Tip) | 12.0mm | 36.0 Fr |
| 1st Valley | 8.0mm | 24.0 Fr |
| Rib Body (18 Count) | 11.0mm – 12.0mm | 33.0 Fr – 36.0 Fr |
| Inter-Rib Valleys | 8.0mm – 9.0mm | 24.0 Fr – 27.0 Fr |
| Retention Valley | 8.0mm | 24.0 Fr |
| Flared Base Flange | 16.5mm (1/2" Length) | 50.0 Fr |
👑 Bob's Choice Recommendations
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Experience Level: Intermediate
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The Prime Durometer Recommendation: #10 (Medium) is the primary recommendation for this model. It provides gentle lateral flex through the 8mm–9mm valley sections while preserving enough column strength to guide the 14.5" length through the canal without excessive bowing.
Color Options: #18 and #30 are available in pure translucent. #00-20, #00-50, and #10 base colors are translucent white and can be mixed with any standard color.
⚠️ Important Safety Disclaimer: Because individual anatomy varies, we cannot guarantee a full fit for all longer or larger diameter pieces. Please use all products with care. By purchasing, you accept full responsibility for safe use. If you experience discomfort, discontinue use immediately.