This cock strap and harness comes in two different sizes in order to satisfy varying ball stretching preferences. The different snapping options allow for more variation in wear. Made of soft leather and cold steel this product is a perfect blend of comfort and functionality. For more stretching options the ring at the bottom of the device is ideal for clipping on additional weights. You could even attach a leash. This cock strap and ball stretcher comes in two sizes, 3.8 cm and 5.1 cm.