Bullballs 1 ball stretcher was our first and has been our most popular silicone ballstretcher, but the old the old molds were not up to current standards. Oxballs creates all designs now in CAD programs, prototype on 3D printers that allow us to refine product till it is truly the best offered. They re-did this one completely. It is the same dimensions, thickness, diameter as the original, but the shape is more refined: a little more squeeze in the middle, a better rolled edge for comfort, better stretch. They added sick new colors: Smoke metallic is almost black Blueballs is a iridescent deep blue. Florescent Orange is brighter. Nuke Glow, a glow in the dark dye so powerful, one hit of light and your balls will glow for 10 minutes. Great for black parties, dark dungeons, or your favorite sex club. This thing just fits and feels right. Made of pure platinum cure medical grade silicone. Only the best from us pigs at Oxballs, the stuff feels like skin. Warms up to body temp fast, keeps your balls sweaty and warm and stretches your sack. Gently, firmly, but without pinching, no blue balls. And silicone does not irritate skin. It is the safest, purest, highest quality material available. Oxballs wanted to make ball stretchers that works and feel good on, and can be worn for long periods. Stretching your sack takes time, so you got to have gear that works. Neoprene ballstretchers did not have enough stretch, and can irritate your scrotum. Who wants a irritated scrotum. Bullballs 1 changed ball stretching, we have so many fan letters from low hanging ball-boys raving about this one.Features pure platinum cure Silicone. Lube safe water base, oil base, water/silicone hybrid, silicone lubes. Cleaning: detergent and hot water, dishwasher, or soak in bleach water solution. Size total length 2 inches, total diameter 1.875 inches. Usable length 2 inches. Inside diameter 1 inch.