Will fit our four ounce and one ounce plastic Bullet Bottles, that we use for all of our carrier oils and diluents. (The pump stem will need trimming for the proper length for whichever bottle you use them with.) 20/410 neck.
Because some people have been confused about the difference….the treatment pump is on the left in this picture. It dispenses a few drops of facial oil, carrier or your chosen diluent. The atomizer top (available here ) is on the right of the picture and gives a fine mist spray. We use them for room sprays and hydrosols. Each is covered with the clear plastic cap shown at the side.