This filter is sold one per retail box.
Antimicrobial technology prevents surface growth of mold, fungus, algae and bacteria. Lasts the life of the filter.
Recommended replacement is at least once each season; more often in hard water areas.
Save $2.00 per filter when you order 2 or more. Your best price($11.00 each) is on a carton of six, which you may purchase below.