SSND-The Rod 12.5mm 4"-10"
Recommended for open bore options
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 is calibrated to a uniform 12.5mm profile, 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.