Bullballs 1 ball stretcher was our first and has been our most popular silicone ballstretcher. But the old the old molds Oxballs made this in were not up to current standards. They create all designs now in CAD programs. Prototype on 3-D printers that allow us to refine product until 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. This thing just fits and feels right is made of pure platinum cure medical grade silicone. Only the best from Oxballs, the stuff feels like skin. Warms up to body temp fast, keeps your balls sweaty, 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). Neoprene ballstretchers were the only stretchy product out there when we created this amazing nut hugger. They are why we started 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. Bllballs 1 changed ball stretching, Oxballs has received so many fan letters from low hanging ball-boys raving about this one. If you have huge nuts, we envy you and hate you, but we make a larger size called Bullballs 2 just for you lucky guys. 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 1.87 inches, usable length 2 inches, inside diameter 1 inch.