If you like strap-ons, and various sized dildos for your strap on, then you’ll love Tantus’s set of silicone O-rings. Compatible with any harness that takes an O-Ring, the Tantus Silicone O-Ring Harness Set includes six different sizes to accommodate your toy of choice. It is made from Tantus own unique formula of 100% ultra-premium silicone. Easy to clean and eco-friendly, the rings are hypoallergenic, hygienic, boilable, bleachable, and dishwasher-safe. Diameter smallest to largest: 1.2 inches, 1.48 inches, 1.74 inches, 1.97 inches, 2.22 inches, 2.5 inches.