The Performance Universal Replacement Pump Sleeve fits pump cylinders from 2.75 to 3.25 inches wide, and is designed to hold a tight seal for more effective and comfortable pumping. The sleeve is made from Blush's premium Ultra Soft X5® Plus TPE, a body-safe material that is soft, stretchy, and gentle on the skin. It can be paired with water-based, silicone-based, and hybrid lubricants, and washed between uses with a disinfectant toy cleaner.