SILICONE BALL STRETCHER 3-PIECE TRAINING KIT Get ready for the ultimate tug on your sack. 3 graduated sizes to safely stretch and elongate your ball bag. As you advance your play you can stack the rings for even more of a stretch. Soft silicone wraps around your nuts like it is part of you. Stack another on top as your sack stretches. Soft & Comfortable Smooth, Seamless Finish 3 Graduated Sizes Wonft.t Pull Skin or Hair Soft-Touch Silicone 3X Stretch Design Small: Height: 0.8 Inches (20 mm) Medium: Height: 1.2 Inches (30 mm) Large: Height: 1.6 Inches (40 mm)