Mach Rings.
Thick centre, creating more tension than the PTV Ultimate Rings. Designed for Pos-T-Vac Ring Loading System. May be used with the ErecAid Systems – manual loading only. Do not use with the ErecAid Ring Loading device. Stretch onto cylinder with fingers and thumbs.
PTV Mach #6 – Medium 8.8mm (.347′).

Osbon B Ring – Large, Maximum Elasticity Ring, Grey
Osbon D Ring – Medium, High Tension Ring, Pink




