The Air Spencer CS X3 Lime Scent has an outer cassette style casing which is made from high quality plastic. Moreover, it is finished with a smooth sleek finish and topped with a chrome CS-X3 emblem. The inner scent cartridge is a refillable cassette. It is easy to change out for your favorite smell. Furthermore, adjust the sliding window to intensify the smell of the fragrance. Life expectancy is estimated at about 6 weeks. Different factors rule into this estimation. Pick up your own CS X3 Lime today. Lastly, be sure to check out our other Air Freshener and other Geeky Items as well!