The Air-Pump Push Up Pads are perfect for modeling different size breasts. Small build-in pump and valve allow to press and release air. The increase in cup size can easily be self-determined with the Air-Pump Push Up Pads. For a considerable increase in the cup size and air can be let in to the pump printed the desired size is reached. And again at the perfect working nipple pressing the air can there possibly again be left. 1 Pair in a package.