The Buon Vino Super-Jet Filter Pads come in three filtration levels designed to work with your Buon Vino wine filter:Coarse (6.0 micron) — Initial filtration for heavy particlesPolishing (1.0 micron) — Second stage for finer particles and claritySterile (0.5 micron) — Final stage for crystal-clear wineHow to choose: Use all...