Dr. Joel Kaplan Silicone Prolong Ring is available in two colors: Clear and Black. Each sold separately. Super stretchy, hygienically superior silicone cock ring endorsed by Dr Joel Kaplan. Safe and pure for body and pleasure. Made using phthalate free, non-toxic materials Silicone. Ring diameter 1.2 inches around. Bulk weight 0.1 ounce. A water based lubricant is recommended. Cock rings when worn around the base of the penis and testicles, many users find that cock rings increase sexual pleasure. Prolong rings, erection enhancement, climax control rings, cock rings. Category: For Men, Rings & Sleeves, Rings. Dr. Joel Kaplan Silicone Prolong Ring is a registered trademark for California Exotic Novelties. Sex Toys and Sexual Wellness. Made in the USA.