Material: Medical grade silicone Caliber: Universal Size of the top: 5 mm Thickness: 1 mm Perfect for treating small balls (bumps, pustules or granulomas) that can come out in a piercing. These little balls are super common and nothing to worry about. They can go on their own but using a silicone disc makes them go much faster. 🔺It is important that the piece is the right length so that it exerts a slight pressure on the ball and helps it go much faster.