COCK-T is our most comfortable cockring yet...the simple, sleek design is a take on classic o-rings. Made in the USA. Lube safe: water-based (recommended), hybrid. Cleaning: Detergent and hot water, dishwasher, diluted bleach/water solution From Oxballs. Color: Black Materials: Pure Platinum Silicone Stats (Approximate): Inner Circumference: 4"/ 10.16 cm Outer Circumference: 7.5"/ 19.05 cm Thickness: 1"/ 2.54 cm