Urethral Sound with Through Hole and Removable Ball Tip - 138mm Long - 15mm Thick

This urethral sound has a flat, but slightly tapered, 6mm diameter tip.
The piece is hollow, with a 4mm diameter through hole running throughout the shaft.
There is a 15mm solid ball at the top of the shaft, which unscrews to reveal the through hole underneath.
There are 3 distinct sections, 6mm, 8mm, and 9mm thickness, with gently tapered transitions between them.
Material: Stainless steel
Total length 138mm.
Urethral insert length 120mm.
Diameter 6mm at narrowest point, 15mm at widest.