Find your perfect size with the Performance Penis Pump Cylinders. This crystal-clear cylinder delivers 2.5" diameter by 12" total length. Its comfortable flange ensures a better seal. Use this cylinder with any Blush Performance pump and accessories for a more personalized fit. Made of body safe acrylic the Performance Pump Cylinder is easy to use and easy to clean. his precision engineered cylinder is part of our Nterchange System making it compatible and interchangeable with other Performance pumps triggers handles and accessories in the Nterchange System. Enjoy peace of mind as Blush products are responsibly made. Blush is a New York based maker of sexual wellness products since 2007.Nterchange System. Mix & Match Accessories For Customized ExperienceUpgrade Your Performance Pump For Bigger Results. More PleasureComfortable Cylinder Flange For Maximum SuctionLaser Etched Measurement Markers To Track Your GrowthTough Acrylic Cylinder Measures 12" Length x 2.75" Width (2.5" Inner Width). Base is 3.5" Width.