Oxballs Pig Ring, cock ring is made of specially formulated silicone. For a great fit and an amazing fun. This cock ring looks hot and performs great when in action. Features: Pure Platinum Cure Silicone. Lube safe water base, oil base, water silicone hybrid, silicone lubes. Cleaning: detergent and hot water, dishwasher, or soak in bleach-water solution. Size inside diameter 1.5 inches. Height .75 inch. Outside diameter 2.25 inches.