Master Series Ring Master Custom Ball Stretcher KitRing Master Custom Ball Stretcher Kit Unlock a new level of sensation with the Ring Master Custom Ball Stretcher Kit from Master Series by XR Brands. This six ring set gives you the freedom to stack, separate, or combine rings for a tailored stretch that heightens anticipation and intensity. Wear them all at once for a full throttle experience, or add them one by one for a controlled progression, the choice is yours with Ring Master. Available at