These 30mm Car Essential Oil Diffuser Vent Clips are a great way to add a touch of fragrance to your car. They feature a stylish design with a variety of colors to choose from, and are made of high-quality materials that are safe for your car. The felt pads are soft and absorbent, and can hold up to 3-5 drops of essential oil. Simply clip the diffuser onto your car's vent, and enjoy the soothing fragrance of your favorite essential oil. The diffuser is easy to use and refill, and can last for several weeks. It is a great gift for women who love cars and enjoy aromatherapy.