Stay Hard Donut Rings Oversized Red Cock Rings from Blush Novelties. Enhances, prolong erection. Increase stamina and enjoy harder erections. Strength. Strong, tear resistant Elastomer. Thicker. 20% thicker than regular donut rings, for even fuller effect. Peace of mind. Made from Thermoplastic Elastomers TPE. Contains no fragrances, phthalates or latex. Size 0.5 inch thick by 0.7 inch inner diameter by 1.67 inches outer diameter each ring.