The Sub-Zero 4204490 Water Filter and Air Cartridge-7042798 2x Combo Pack Set is a convenient and essential accessory for your Sub-Zero refrigerator. This set includes two items - a water filter and an air cartridge, both made of durable ABS plastic. The filters are designed to last with a capacity of 750 gallons, and are NSF rated for quality assurance. With a sleek white color and a glass finish, these filters are compatible with all Sub-Zero models and are suitable for built-in installation in larder fridges. Made in the United States, this combo pack set is a reliable solution to keep your refrigerator running smoothly.