Incense -Car Fragrance Stones Highlights Generic Brand Car Fragrance Stones Description: Material: powder stone Small and exquisite, easy to carry. Absorbing essential oil through the holes, without heating. Ideal for: toilets, cars, office and bedroom, etc. It's a good choice to use it while doing yoga Usage: Soak in clear water for about 2-3 hours for the first time, then pat dry, then add your essential oil. Dip it in when switching to other types of essential oils. Design: various designs for your designs Size: approx. 3.5*0.6cm (Width*Height) Package includes: 4x fragrance stones Note: You can add pure essential oil, complex essential oil, fragrance oil or perfume directly. If you add pure essential oil or complex essential oil, your body will benefit from the essential oil. Meanwhile, it won't work if you just add the fragrance oil or perfume, they smell like they really are.