The SSND-BMK1 is a compact 4" sound with a tapered entry tip that steps through a few progressive swells before reaching an 11 mm (33 Fr) maximum body, then settles into a retention valley near the base.

Details

• Entry tip: 8 mm (0.315", 24 Fr)
• Forward shaft swell: 9.5 mm (0.374", 28.5 Fr) — 2.5" long
• Mid-shaft neck: 9 mm (0.354", 27 Fr)
• Main body (max diameter): 11 mm (0.433", 33 Fr)
• Retention valley: 8 mm (0.315", 24 Fr)
• Insertable length: 4" (100 mm)
• Base: Safety flange

Choosing your silicone firmness

For the SSND-BMK1, Bob recommends #10 (Medium). For an 11mm body on a short 4" shaft, it balances gentle flexibility with enough structure to guide the progressive swells into place.

If you want extra cushioning and pliability for extended wear, #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

The SSND-BMK1 is a short, beginner-friendly piece, but it does expand up to 11mm over its 4" length — go slowly through the swells rather than pushing straight to full depth.
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.