SSND-MD 6-14
Recommended for open bore options
This flat-track architecture ensures that the sound continues to exert a steady, uniform expanding pressure when left in place at any chosen segment, allowing your anatomy to adapt naturally before moving up to the next size.
Anatomical Sizing & 8-Stage Progressive Mechanics:
Built in direct response to user requests for a more seamless, flat-transition tracking column, the 8 distinct expansion zones distribute material volume with mathematical precision:
-
The Approachable Entry: Starts with a highly welcoming 6.5mm rounded tip that ensures a smooth, low-friction introduction through the sensitive opening path.
-
The Flat-Track Staging Zones: The shaft steps up meticulously through closely grouped nodes measuring 8.1mm, 8.95mm, 10.3mm, 11.05mm, and 11.85mm. Because each segment drops down only a fraction of a millimeter into its trailing valley, tissue stays uniformly engaged without slipping back down.
-
The Upper-Tier Peaks: The final barrels of the shaft push out to a robust 13mm before hitting a maximum 14mm peak expansion.
-
The Deeper Retention Valley: Past the final 14mm peak, the sound drops into a specialized hold-in-place relief valley at 9mm. This deep groove permits the sphincter muscles to close securely around the seat, anchoring the sound comfortably right in front of the safety base flange.
Anatomical Depth Guide:
Offering an insertable length of approximately 5.75 inches (144mm) up to the flanged base, this flexible probe safely lines the primary pendulous tract and rests comfortably within the lower canal curve. This compact depth keeps the entire progressive stretching array perfectly contained within the primary muscle groups for maximum hands-free stability.
Dimension & Sizing Profile
The structural specifications for the MD 6-14 architecture are calibrated as follows:
| Segment Number | Largest Diameter (mm) | Trailing Valley (mm) | French Sizing (Fr Equivalency) |
| 1 | 6.85mm | 6.50mm | 20.5 Fr — Rounded Entry Tip |
| 2 | 8.10mm | 7.60mm | 24.3 Fr — Micro-Step Node |
| 3 | 8.95mm | 8.40mm | 26.8 Fr — Low-Intermediate Step |
| 4 | 10.30mm | 9.60mm | 30.9 Fr — Mid-Shaft Tracking Zone |
| 5 | 11.05mm | 10.50mm | 33.1 Fr — Intermediate Expansion |
| 6 | 11.85mm | 11.34mm | 35.5 Fr — High-Intermediate Step |
| 7 | 13.00mm | 12.45mm | 39.0 Fr — Pre-Peak Calibration Ridge |
| 8 | 14.00mm | 9.0mm | 42.0 Fr — Maximum Diameter Peak |
👑 Bob's Choice Recommendations
-
Experience Level: Beginner. Perfect for users starting with smaller dimensions who want a gentle, predictable pathway to safely accommodate larger volumes over time.
-
The Prime Durometer Recommendation: For the ultimate user experience, Bob strongly recommends choosing our #10 (medium) silicone density. This choice keeps the graduated segments a little more rigid, ensuring the sound goes in significantly easier without bowing, while sending clear, high-definition tactile feedback directly to your hand as each ridge clears a muscle layer.
-
The Continuous Expansion Alternative: If your goal is long-term, low-fatigue retention wear, selecting our #00-50 (soft) compressible silicone provides a plush, spongy candy-like feel. This material compresses slightly during insertion and then exerts a continuous, gentle outward stretching pressure against internal walls.
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.
