Plum O-Ring 4 Pack from Sportsheets. The Sportsheets Merge Collection Rubber O-Rings 4-pack are firm yet stretchy, latex free rings in sizes 1.5 inches, 1.75 inches, 2 inches 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 Ons. Features: mix and match sizes and vibrant colors to stabilize the base of dildos. Wear on your penis and testicles to enhance stamina. Brighten up your strap on play. Limited Lifetime Warranty. Product dimensions: 1.5 inches O-Ring. 1.75 inches O-Ring. 2 inches O-Ring. 2.25 inches O-Ring. In the box: four pack of rubber O-Rings. Materials 100% Nitrile, 70 NBR rubber latex free. Video. 2021.