Your nipples will become irresistibly large with the Perfect Fit nipple suckers. These special suckers enlarge your nipples and make them hard more quickly. Also, the mini rings keep them stiff for a longer period of time. Check beforehand which rings fits best on your nipples. Put these around the shaft of the pumps. How does it work? You place the pump on the nipple. You then squeeze the ball. The nipple is sucked inside. When the nipple has reached the desires size, push the ring over the nipple. The rings are made of soft stretchable material for an optimal wearing comfort and a perfect fit. This will ensure that you can wear the rings for quite some time.