These beautiful satin or charcoal black finish stainless steel foaming soap dispenser pumps will compliment any bathroom or kitchen! Will not rust. Use them to dispense hand soap or dish soap. You can buy foaming soap or make your own. It takes about 2 pumps to get a good amount of soap. Foaming pumps do not fit our soap lids with built in threading. The pumps come with the collar that attaches them to one of our soap pump adapter lids and 4″ tube that you can cut to fit any size jar. Pint and quart jars work well. The pump mechanism plus straw is about 6″ long, which means it comes to about one inch from the bottom of a quart jar. They are made of stainless steel and plastic. The satin finish looks like a natural or brushed stainless steel. While the charcoal black has a lovely, matte black finish. The threading is 28/400.