Wild Essentials car vent aromatherapy diffuser gift sets are made with a hypoallergenic, surgical grade 316L stainless steel pendant, include 4 - 100% pure essential oils and 8 vibrantly colored, premium refill pads. Aromatherapy On the Go: Great for any vehicle, our essential oil car vent diffusers allows you diffuse your favorite scents using your vehicle's HVAC system! Premium Essential Oils: While other brands opt for synthetic scents or "aroma oils", our oils are 100% pure and therapeutic grade! Every order includes Lavender and Peppermint, as well as two of our incredibly soothing and unique synergy blends, Zen and Inner Calm. Fashion-Forward and Functional: Stylish and versatile, our car vent diffusers have a secure magnetic closure and have vents in front and back of the locket to ensure proper air flow to let your scents fill the air. World-Class Craftsmanship: Made from hypoallergenic, surgical grade 316L stainless steel, our diffuser is as sleek as it is durable!