When you’re looking for the ultimate pair of high-quality performance rings, the Max-Width Silicone Rings are the best choice for hard erections that last and last! The thick rings can be used together or individually. Once they’re comfortably around the base of your shaft or balls, they gently restrict blood flow to help you achieve bigger and more intense erections. Try the rings in different combinations to find the most explosive results. Use both rings at the same time for the ultimate stamina test. Clean the rings with toy cleaner and warm water after use. Size ring 1: Inner diameter: 2.4cm Outer diameter: 3.3cm Size ring 2: Inner diameter: 3.3cm Outer diameter: 4.2cm