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 Measurements: 2.79 inch external diameter. 0.98 inch internal diameter. 1.41 inches tall Note: Cylinder not included For use with the Deluxe Steel Handle Pump With 2.25 Inch Penis Cylinder (SM-AD529-LRG)