The #1 Coarse Filter Pads are the best place to start when filtering you wine because they help remove some of the larger sediment (5 micron) from your wine. All Buon Vino wine filters have been designed to use ORIGINAL Buon Vino Filter Pads. The micron sizes and consistency of Buon Vino Filter Pads have been designed to give optimal performance when used with Buon Vino wine filters. The flow rate of the pump is designed to work in conjunction with the Buon Vino Filter Pads to give you the best filtration possible. 3 filter pads per pack.