✿【DIFFUSER SIZE 】Every aroma diffuser stick is 7.87 inches in length and 3.5 mm in diameter, they are in just fine sizes for putting into diffuser bottles. ✿【REED DIFFUSER STICKS USE】Need for use with the diffuser, slow to get wet with the fragrance,They are absorbent and diffuse the scent well. ✿【DIFFUSER REEDS】Use them for your air freshener with the oils , Just put your sticks in something like a vase add oil of your choice release fragrance constantly. Only have to flip them over once a month otherwise continuously releases scented oils. ✿【COMMITMENT TO SERVICE】Our worry-free 18-month warranty and friendly customer service.