Correct your nipples: cover small, flat or inverted nipples with nipple suckers, the nipples are drawn out by the pressure, and are molded into a suitable shape for flat and inverted nipples, which help mothers breast-feed better Reliable quality: these nipple pullers are made of quality PP material, odorless and non-toxic, durable and no easy to deform, which can help you carefully care for women's delicate nipples, let the baby at ease Easy to use: these nipple aspirators are easy to operate, featured with transparent body, easy to adjust the inside pressure, just aim at the nipple and twist slowly, and inner effect can be seen clearly What's includes: you will receive 2 pieces nipple pullers suckers, each one is 3 cm/ 1.18 inches in diameter, the surface of the product is smooth and does not hurt your skin, and the integrated tube body has no seams and is more comfortable to use Warm reminder: during use, the piston should not be rotated too h to prevent the screw from jacking up; The oil at the piston position is for lubrication, so it cannot be completely washed, it needs to be disinfected and cleaned with alcohol; Remember not to boil in h temperature water