Black silicone urethral sound with a tapered tip and flanged base resting on a blue grid background.
Multicolored silicone urethral sounds arranged in a circular starburst pattern showing available color options.
A stacked group of colorful silicone urethral sounds shown in assorted colors on a plain white surface.
A row of colorful silicone urethral sounds in various colors lined up vertically on a blue grid background.
SSND-BMK1 9-11mm multi-dimensional urethral sound with tapered tip and hold-in-place valley, 4-inch insertable length, 27-33 French

SSND-BMK1

Regular price$37.00
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SSND-BMK1 is a compact 4" insertable multi-dimensional flexible silicone sound engineered with subtle progressive swells and a proximal retention groove. Designed for dynamic movement and comfortable extended wear, this custom-requested model begins with an 8mm gently tapered tip for effortless initial entry. The forward shaft expands smoothly up to 9.5mm over a 2.5" run, drops into a 9mm mid-shaft neck, and expands up to an 11mm (33 Fr) maximum diameter body. Just before the flared safety base, the shaft tapers back down into an 8mm (24 Fr) retention valley designed to let the meatal sphincter capture and hold the sound securely in place. Available in solid-core or open-core configurations, the hollow option allows for natural fluid drainage during wear.

Anatomical Sizing & Mechanics

  • Gently Tapered Entry: Starts with a smooth 8mm (24 Fr) tip to guide initial placement easily into the urethral opening.

  • Progressive Shaft Swells: Expands to 9.5mm along the forward 2.5" run before relaxing into a 9mm neck and stepping up to its 11mm (33 Fr) maximum diameter body.

  • Controlled Volumetric Stretch: The 11mm maximum expansion allows tissue to gradually stretch before settling into the final groove.

  • Proximal Retention Base: Narrows down to an 8mm (24 Fr) retention valley right before the safety flange to anchor the piece comfortably for extended wear.

Anatomical Depth Guide

With an insertable length of 4" (100mm), the SSND-BMK1 provides shallow-to-intermediate reach focused primarily on entry-level depth and targeted retention. Combined with an 11mm (33 Fr) maximum diameter, it offers gentle, manageable volume without deep anatomical penetration.

Dimension & Sizing Profile

Segment / Feature Outer Diameter (mm) French Sizing (Fr)
Tapered Entry Tip 8.0mm 24.0 Fr
Forward Shaft Swell 9.5mm (2.5" Length) 28.5 Fr
Mid-Shaft Neck 9.0mm 27.0 Fr
Main Body (Max Expansion) 11.0mm 33.0 Fr
Retention Valley 8.0mm 24.0 Fr
Safety Base Flange Flared Safety Flange

 

👑 Bob's Choice Recommendations

  • Experience Level: Beginner

  • The Prime Durometer Recommendation: #10 (Medium) is the primary recommendation for this model. For an 11mm (33 Fr) body on a short 4" insertable shaft, #10 offers the ideal balance of gentle flexibility and structural column support.

  • The Alternative Durometer: Consider #00-50 (Soft) for users seeking extra material pliability and cushioned compression during extended wear.

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.

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