Cal Exotics Optimum Series Universal Penis Pump SleeveYour pumping experience will be more luxurious than ever before with the Universal Pump Sleeve. This soft and incredibly comfortable 1. 5 inch long by 3 inch wide donut cushions your penis with soft and stretchy TPR, a material thats made to please. Pumping works by creating an airtight seal around the base of your penis and, using suction, increases pressure and blood flow to your penis. This results in immediate harder erections and, over time,