From Oxballs. Ball-T is a shorter ring, built for high and tight nut sacks, or smaller balls. Also good as a trainer. Wear one for a while, stack another on top as your sack stretches. Pure Platinum Cure Softflex Silicone. Cleaning: detergent and hot water, dishwasher, or soak in bleach-water solution. Inside Diameter 1.25 inches. Outside diameter 2 inches. Color Black.