Get your pump on...comfortably With the convenience and durability of the Cylinder Comfort Seal from Size Matters, now pumping sessions are more comfortable and enjoyable Simply slip the stretch-to-fit comfort seal over your pump and start pumping away. Made to fit over any Size Matters penis pump cylinder and easy to clean. Measurements: 2.79 inch external diameter, 0.98 inch internal diameter, 1.41 inches tall, Material: TPR, Color: Smoke, Note: Cylinder not included