The Optimum Series Maximum Results Pump Set includes 2 powerful suction pumps, a detachable hose and a single-handed Master Grip pump handle to deliver maximum results with every pump session. With every squeeze of the Master-Grip single-handed pump, you can look forward to powerful girth and length increase. To give you all the space you need to grow, each kit includes a large and a Xlarge pump cylinders with quick air release levers. The soft, flexible air air hose makes it each to switch pump cylinders, but is designed to maintain air pressure even when the hose is removed. To reduce or remove pressure, simple press the air release level on the tip. When used correctly, this sensational pump can increase girth, sexual stamina and erotic pleasure. Whether youre a first time user or experienced pumper, our erotic enhancement set has you covered. 2 Penis pumps included Superior suction Quick air release valve Flanged base for secure seal Easy-squeeze trigger handle One year warranty Measurements: Large Cylinder: 9 x 2.25 22.75cm x 5.75cm XL Cylinder: 9 x 2.75 22.75cm x 7cm Materials: Styrene Acrylonitrile, ABS Plastic, PVC Plastic