SSND-The Rod 12.5mm diameter smooth silicone urethral sound displayed in 12, 16, and 20 inch insertable length options in black and blue on a blue grid background, demonstrating its uniform cylindrical shaft and highly flexible profile
SSND-The Rod 12.5mm diameter extra smooth silicone sound
Configurable length smooth urethral sound 12 to 20 inches
SSND-The Rod 12.5mm diameter extra smooth silicone sound
Configurable length smooth urethral sound 12 to 20 inches
SSND-The Rod 12.5mm diameter extra smooth silicone sound
Configurable length smooth urethral sound 12 to 20 inches
SSND-The Rod 12.5mm diameter extra smooth silicone sound
Configurable length smooth urethral sound 12 to 20 inches

SSND-The Rod 12.5mm 12"-20"

Regular price$40.00
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Shipping calculated at checkout.
Color
Length

The Rod 12.5mm is a smooth, straight-shaft sound with a uniform 12.5mm (37.5 Fr) diameter from tip to base — no ribs, valleys, or diameter changes, just a continuous, fixed-volume stretch. Available in four lengths from 4" to 10".

Details

  • Shaft diameter: 12.5 mm (37.5 Fr) — uniform full length
  • Available lengths: 4", 6", 8", 10"
  • Base: Flat safety flange

How it works

The rounded tip aligns smoothly with the main shaft, then the 12.5mm diameter holds constant all the way to the base — with no valleys or expansion zones, the surrounding muscle experiences a stable, fixed-volume stretch with no pressure variation.

Length guide

  • 4": stays well in front of the bulbar curve, for a stationary, low-fatigue stretch
  • 6": covers the full pendulous tract, resting at the pelvic floor bend
  • 8": navigates past the bulbar curve and through the external sphincter
  • 10": bridges the prostatic urethra and internal sphincter for full-length reach

Choosing your silicone firmness

Given the substantial 12.5mm volume, Bob recommends #00-50 (Soft) — it lets the column flex and compress under tight muscle walls for a comfortable, low-fatigue stretch.

For maximum structural presence with no compression, #10 (Medium) is also available.

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.

Please note

This uniform 12.5mm profile is recommended for intermediate-to-advanced users who have already mastered smaller volumes.
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.

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