SSND-MRB 7 Rib 10.3-13mm
- In stock, ready to ship
Recommended for open bore options
This shaft incorporates seven distinct, sequential rib contours that deliver a wave-like tactile progression during insertion. The third rib reaches the peak 13 mm (39 Fr) diameter, creating a satisfying point of maximum dilation, followed by subtle variations down the shaft. Constructed from medical-grade platinum-cured silicone, it balances structural stability with anatomical flexibility, and is offered in both solid core and open-bore (hollow sound) variants.
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Entry Tip: Smooth, rounded leading bead designed for gentle initial alignment and comfortable entry.
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Ribbed Shaft Progression: 7 ribs with varied profile steps, featuring a maximum peak diameter of 13 mm (39 Fr) at the third rib.
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Peak Diameters: Ranging from 10.3 mm (31 Fr) up to the 13 mm (39 Fr) primary ridge.
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Retention Valley: An integrated 8.8 mm (26 Fr) narrow valley situated directly before the base to anchor comfortably for extended wear.
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Safety Flange: A wide 16 mm flared base designed to prevent over-insertion and ensure total peace of mind.
Anatomical Depth Guide Featuring a generous total length of 7.75 inches (197 mm) and a dedicated 7-inch (178 mm) insertable length, the MRB 10.3-13mm delivers extensive internal reach. The extended shaft allows users to navigate the urethral canal smoothly while keeping the flared base easily accessible for control.
Dimension & Sizing Profile
| Segment / Feature | Diameter (mm) | Sizing (Fr / In) |
| Entry Point | 10.3 mm | 31 Fr |
| Peak Rib (3rd Rib) | 13.0 mm | 39 Fr |
| Shaft Profile Range | 10.3 mm – 13.0 mm | 31 Fr – 39 Fr |
| Retention Valley | 8.8 mm | 26.4 Fr |
| Safety Flange Base | 16.0 mm | 0.63 in |
| Insertable Length | — | 7.0 in (178 mm) |
| Total Length | — | 7.75 in (197 mm) |
👑 Bob's Choice Recommendations
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Experience Level: Intermediate (12mm – 15mm maximum diameter tier)
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The Prime Durometer Recommendation: We strongly recommend our #10 (Medium) durometer silicone density as the default primary choice. This firmness provides essential structural integrity, preventing the shaft from bowing or buckling during insertion while transmitting crisp, high-definition tactile feedback along each rib.
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.