Measure your progress on the way to harder erections! The realistic silicone stroker entry is smooth and erotic, especially with lube, and the vacuum inside the tube draws blood to the penis to make it longer and thicker every time. Consult the pressure gauge on the clear cylinder to monitor your results. Clean your pump with toy cleaner and a warm water rinse. Features: Great for players who want to increase their length and girthRealistic vaginal orificeEntry made of creamy, smooth siliconeVacuum pressure creates a longer, harder penisCylinder measures 2.25 in x 9.25 in How to use 1) Insert flaccid penis into chamber and press back against groin for a better seal. 2) Slowly pump to increase the pressure inside the chamber. This will draw the blood into your penis for it to engorge 3) When no more air comes out of the pump, you've reached the maximum pressure. Wait roughly 10 minutes, then release the pressure. Massage your penis afterward to help increase blood flow. Tips: 1) Shave your pubic hair to help create a better seal. 2) Put on a cock ring after a session to maintain your erection for intercourse immediately afterward. Do not leave the cock ring on for more than 30 minutes. 3) Measure! Tracking your growth before and afterward to help gain a sense of temporary gains and long-term positive impact.