The independent scrotum rings of the silicone ball spreader provide added support and stamina. This erection enhancer is made from stretchy, comfortable silicone that's body-safe, unscented and phthalate free. 1.25 3.25 Cm penis ring diameter 1 2.5 Cm scrotum rings diameter 4 x 2.5 10.25 Cm x 6.25 Cm overall