We provide porous plastic discs to filter out solid impurities that may have entered a dropper.
Droppers are used to put medicinal liquids into the bodies of humans and animals; while using these droppers one must be careful to not pass on any solid impurities from the dropper into the bodies of humans or animals. Thus, the mouths of these droppers are fitted with porous plastic filter discs to prevent the passage of solid impurities which may have accidently entered into the droppers.
The micron rating, porosity and pore size of the filter disc can be adjusted to let only a required, limited amount of liquid pass through the dropper (drop by drop).