Silicone Support Rings Clear 3 piece set. Medium, Large and Extra Large multiple purpose rings. 100% Pure Silicone. Medium ring measures 1.25 inches diameter, large ring measures 1.5 inches in diameter and extra large ring measures 2 inches in diameter. Bulk weight 0.5 ounce. Safe and pure for body and pleasure. Made using phthalate free, non-toxic materials: Silicone. Do not wear a cock ring for more than 30 minutes. Cock rings give you a longer lasting erection by trapping the blood supply in the penis and intensify orgasms. Cock rings are ideal for men with premature ejaculation or erectile dysfunction. There are no guaranteed results from cock ring usage. Category: For Men, Rings & Sleeves, Rings. Silicone Support Rings is a registered trademark for California Exotic Novelties. Sex toys and sexual wellness.