Straight Urethral Sound with Penis Ring - 100mm Long - 8mm Thick

This urethral sound has a flat tip, slightly curved at the edges, 8mm diameter.
It's a straight shaft, 8mm diameter all the way except for 3 grooves cut into it, each 6mm diameter.
This design allows the ring to be worn around the penis, while the urethral sound sits inside.
Two rings are included, 28mm and 30mm diameters, allowing the wearer to find a snug fit.
Material: Stainless steel
Total length 100mm.
Urethral insert length 93mm.
Urethral insert diameter 6mm at narrowest point, 8mm at widest.
Penis ring sizes 28mm and 30mm inner diameter.