Replacement gaskets, intake straws, silicone seals, aeration mesh, and silicone seals. Short straws fit a 16oz Pint, Medium straws fit a 32oz Quart, and Long straws fit a 64oz Half Gallon Mason jar. Unless chosen otherwise, all of our soap pumps come with the necessary components. You only need to buy this if you got a pump somewhere else or lost yours. First select either Standard or Foaming Pump and then the part you need.  Aeration Mesh is currently the only option for Foaming Pumps.