This penis pump kit is all you'll ever need. The angle-based pump offers superior suction with an EZ-squeeze bulb with quick air release valve. The flanged donut sleeve ensures a secure seal and is removable for easy cleaning. The kit also comes with a pliable prostate probe and three stretchy all purpose rings to maintain your erection for longer. ABS cylinder (7.75” x 2.25”/19.75 cm x 5.75 cm) with TPR probe (4.5” x 1”/11.5 cm x 2.5 cm) and donut and TPE rings (1”/2.5 cm diameter).