Rascal Toys D-Ring Glow in the Dark Cock Rings X3. Glow 3 pack of Donut Rings are extra thick for comfort. Made from strong and super stretchy Thermoplastic Elastomers TPE. No roll design. Inner diameter 0.7 inch, outer diameter 1.75 inches. 3 ways to wear. Around the shaft. Around the balls. Around the shaft and balls. Care instructions: this product is safe with all lubricants. Wash thoroughly with mild soap and warm water or toy cleaner. Pat dry and allow product to completely air dry. Store separately.