Features: Easy to install: The car air diffuser can be easily hung on the rearview mirror without blocking the view or taking up space. Add your favorite perfume or essential oil, and all passengers can enjoy a pleasant environment Reusable jar: The air freshener jar is reusable, so after the fragrance you added disappears, you can replenish perfume or essential oils with other fragrances Specifications: Material: glass, paper Color: colorful Size: Square perfume bottle: about 1.97 x 0.98 inches/5 x 2.5 cm(Length x Width) Sticker: about 0.79 x 0.79 inches/2 x 2 cm(Length x Width) Package includes: 30 x Square perfume bottle 30 x Sticker Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.