Our oil car diffuser locket diameter is 30mm and the material is surgical grade 316L stainless steel. The clip part has a black rubber protective sleeve so it won't scratch anything, and it easy to install and very sturdy as well as attractive.

Clean the air surrounding you by fragrance diffuser. You just drop some oils on the replaceable felt pads to help you improve the air in the car, so that you won't feel tired while driving and give you a relaxing journey. Some essential oil has strong smell while some not. For a better result, we recommend you use both diffuser lockets on the air vent by using some strong enough essential oil.

A gift set for someone who love essential oil diffuser. 2pcs car oil diffuser lockets, comes with 10 colors refill pads, allow you to change the essential oils you want at will. When you don't need to use the aroma car diffuser, just put diffusers in velvet bag to protect them

It doesn't need to charge. Also it doesn't need to put water in it either. Just need to drop some essential oil you like on the pads, then enjoy the aroma anytime,anywhere.

Package include: 2 * car diffuser locket + 2 * Small yarn bag + 10pcs refill pads + 1 * black gift packing bag