Made from a TPE of excellent quality: the ring can easily be stretched without breaking.  Compatible with silicone lubricants, the bestselling lubricants currently sold for penetration use. May help counter premature ejaculation, erectile impotence and maximize the enjoyment of man (extension orgasm).  SPECIFICATIONS High quality elastomer Durable For a stronger and longer erection Silicone Lube Friendly Easy to clean Expandable rings 2 colors: black and clear 3 Sizes : Small, Medium, Large Excellent for men who desire excellent control over their erection