The 3-piece Stacker Rings set features unique rings that are slightly wider than a standard cock ring. This makes them ideal for use as either a cock ring or a ball stretcher. The rings are available in three sizes: 1.4'' (35mm), 1.6'' (40mm), and 1.8'' (45mm), making them perfect for stacking around your cock, balls, or both. You can use one, two, or three for light to heavy cock and ball stretching, or place one on your cock, one on your balls, and the other around both. The possibilities with the Stacker Rings are endless.