ProTeam Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart Package of 2 High Filtration Discs Manufacturer Part No.: 101220 - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. 2 Filters in Package High Filtration Discs for Dome Filter Recommend Changing Once Every 6 Months