CenturionPro Mini - Tumbler O RingThis is our standard O Ring that works with our Mini, Original, Silver Bullet and Gladiator machines. This O Ring is a key mechanism in our successful product series and sets our products apart from competitors. The Polyurethane ring attaches to the tumbler wheel adding durability and strength while the powerful structure maximizes friction. As a result, this allows each tumbler to consistently turn with ease at just the right speed and works with the