These Luminara fragrance cartridges are for use with Luminara fragrance diffusing candles. 10 distinct scents crafted with rare unique ingredients and essential oils to diffuse subtly, safely and beautifully. Each fragrance cartridge has a 200-hour useage time. Available in Honeycrisp Apple, Sea Mineral Mist, Warm Embers, Vanilla Sea Salt, White Tea, Island Gardenia, French Lavender, Spiced Cinnamon, White Pine & Balsam, and Heirloom Pumpkin. Simply remove the silver seal from the cartridge and slide into the base of the candle until it is secure and then turn on the candle and let the room fill with a beautiful aroma.