Your pumping experience will be more luxurious than ever before with the Universal Pump Sleeve. This protective and pleasurable sleeve makes your pumping pressure more pleasurable than ever while maintaining that airtight seal you need to get the most growth out of your sessions. Penis pumps use an airtight seal and hand pump to create suction around your penis. This results in increased pressure and blood flow to your penis. In the short term, this means rock-hard erections that’ll increase your confidence and drive your partners wild. With our donut sleeve, you no longer have to endure uncomfortable suction to help your penis reach its full potential. This super soft sleeve fits pump cylinders up to three inches or eight centimeters in diameter, so stretch it over your favorite device’s cylinder for comfort and pleasure like never before.