Ballgear Ball Stretcher Max Black from Nasstoys of New York. Nasstoys Ballgear Adjustable Stamina Strap. Enhances hardness and sensitivity. Adjustable stamina strap. Phthalates free body safe materials Metal Iron Snaps, Polyurethane PU. Size length 2.25 inches, insertable length 1.75 inches. Easy to use. Snap the Ball Stretcher. One image shows a great how to use Ballgear Ball Stretcher.