Take your pumping experience to the next level with the insanely comfortable Precision Pump Silicone Pump Sleeve. The Precision Pump Silicone Pump Sleeve fits over the cylinder of most pump sizes to cushion and protect your rod. You’ll love the soft and cushy feel against your erection as you pump your penis to its maximum size!The sleeve features a ribbed interior for added pleasure as you pump. Who says that penis training has to be all about work? The sleeve keeps a gentle but firm grasp on both the cylinder and your manhood to give you a superior airtight seal. Keeping that seal impenetrable is crucial to getting the best results to thrill you and your lover. This sleeve measures 2.25 inches long by 2.5 inches wide. It fits cylinders up to 3 inches in diameter, so try it out on the pump of your choice.