T-Cell? Air Freshener Refill, Citrus, 6 Refills Per Carton.The TCell refills contain Microtrans, a true odor neutralizer and air freshener. TCell refills contain only the highest quality essential oils to reinforce the cleanliness of the washroom and image of the facility. They are available in a wide range of customer preferred fragrances from mild to intense for a clean, fresh scent that lasts. TCell utilizes a patented fluid delivery system, delivering a precise dose of pure designer fragrance, odor neutralizer, and air freshener that remains constant for 60 days. It is the perfect environmental solution because it does not contain propellants or added VOCs and the components are recyclable.