O-Ring Kit from Tantus Silicone. Tantus Silicone O-Ring Harness Set is compatible with any harness that takes an O-Ring. Set includes six different sizes to accommodate your Tantus Toy of choice. Do not use O-Rings on penis, this is for toy use only. Harness compatible, when O-ring is used. Safe for your body. Made from Tantus own unique formula of 100% Ultra Premium Silicone.Easy to clean. Eco-friendly, hypoallergenic, hygienic. Boilable, bleachable and dishwasher safe top rack. Diameter of rings from the smallest to largest 1.2 inches, 1.48 inches, 1.74 inches, 1.97 inches, 2.22 inches, 2.5 inches. Old SKU TAN8594. New SKU TAN210480TC. No video. 2021.