Thank you for viewing. This is the Torayvino Super Series. It's a set of 2 boxes, each containing 3 STC.V2J-ZR replacement cartridges, for a total of 6 cartridges. These cartridges are designed for high removal of mold odor (2-MIB), lead, and total trihalomethanes. Brand new, unopened, and unused. We are currently not considering any discounts on this product. Thank you for your understanding.