This listing is for one car diffuser. Car diffusers come pre-filled with quality fragrance oil and car diffuser base. They are 8mls. If you want to leave your car or closet smelling fresh, try these! Check out my other car diffuser listings! I offer many scents with more scents being added often! If there's a scent you'd like that you don't see listed, send me a message. I may have it and I'll just have to test it to see if it's compatible with my reed diffuser base. Directions: *Unscrew wooden top *Take out little plastic plug *Put wooden top back on *Turn upside quick 1-2 times to get wooden cap lightly damp. Repeat when scent wears away. *Hang from rear view mirror or in a smash closet. Product description: - Glass Diffuser Jar + Wooden Cap - Quality Fragrance Oils + Car Diffuser Base Our car diffusers are simple to use and work great! Thanks for visiting my shop! Do not let the diffuser tip over. Oil may damage surfaces. I am not responsible for any damage incured by not handling product correctly. Thanks for checking out my items! Check out my others items in my shop!