Bundle of 2 items: Maxi Black Men's Vacuum Penis Pump & 4 Sizes of Constriction Rings. The Maxi brass penis pump creates an immediate, powerful suction, while the ergonomically designed nylon housing is lightweight and easily used one-handed. It's safety purge valve is easy to operate with a simple turn. We include 18 inches of kink-resistant hose, and our specially-designed Quick-Disconnect Fittings to offer trouble-free pumping sessions. You can even disconnect the hose from the cylinder and it will maintain vacuum! Specially designed to be used with or without any sleeve. For beginners, it is important to start the pumping process slowly to avoid discomfort. Remember to use the quick release valve if the pressure becomes too severe. Continue pumping/releasing air until you've found a suitable level of pressure. The penis should look swollen but should not hurt. Keep an appropriate amount of pressure on your penis and wait 20 minutes. Once the session is complete your penis should appear thicker / longer and have heightened sensitivity.