The Sportsheets® Merge Collection® RUBBER O RINGS 4-PACK are firm yet stretchy, latex-free rings in sizes 1.5, 1.75, 2 and 2.25 inches, giving you choices to personalize the ideal size and tightness that work best for your body. Mix and match sizes and vibrant colors to stabilize the base of dildos, wear on your penis and testicles to enhance stamina or to simply brighten up your strap on play. Merge with pleasure using the Merge Collections® vibrant pack of O Rings. Compatible with all interchangeable Strap On's.