Sport Fucker has done it again. This is not just a cock ring, but a complete boner kit! The stretchy TPR material allows the two square rings to slide over your package and hold it firmly in place. Each kit includes a square cock ring with an attached ball stretcher and an additional loose ball stretcher. Add one or more of our extension packs to stretch your balls even further. You don't always have to buy the same color; you can mix and match different colors to achieve a great sporty look. Dare to play freely with our boner kit in your jeans. The more spacers you add, the more friction and sensation you will feel. Add our extension pack and wear raw denim while free-balling. Just from the friction, you'll be breaking a nut at your bar! Material: TPR and silicone. Diameter of small cock rings: 1.4 cm. Diameter of the large cock ring: 3.2 cm.