Oxballs Pig Ring, cock ring is made of specially formulated silicone. For a great fit and an amazing f*ck. 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.