The dual pack contains filter cartridges for two batches of wine.

Included are two each of 1 micron filter cartridges and two each of 5 micron filter cartridges. The 5 micron filter is typically used for course filtering, which occurs after the first clarification of wine is complete and it is being transferred (or racked) to another carboy. The 1 micron filter is used for fine filtering, and can be used if racking to another carboy or while transferring wine to the bottle.