The package includes: 2 x 30mm Aromatherapy Diffusers for Car Ventilation + 20 x Scent Seals ※ High Quality: Our car diffuser medallion is made of high quality 316L stainless steel which will not lose its luster or its discoloration. With high polishing process, smooth surface. There is a black protector on the clip to prevent scratching the vehicle. Safe and Happy Driving: A car diffuser is a great way to experience essential oils while driving. Use your favorite essential oil to help relieve stress, anxiety or headaches. You can enjoy the scent of diffused essential oils. Easily change scents: With 32 different colors of padded cushions, the cushions are washable and reusable without leaving residue. You can easily change the gaskets at any time without changing your car's air vent diffuser, which is a big plus. How to use: Add a few drops of Essential Oil/Fragrance Spray into the seal and place it in the medallion part of the diffuser. Just place it on the vent and let the fragrance flow gently through small holes in the back.