Premium stainless steel material, smooth surface, strong magnetic closure, long lifetime. Come with 10 felt pads, different colors, felt pad size is 22mm in diameter, thickened pads, absorb essential oil easily. Relieve your stress and keep alert when you drive. Aroma around you, bring you good mood. Minimize some smell you don’t like. Use your favorate essential oil to enjoy your daily life, your trip. Usage: apply a few drops of your essential oil to one felt pad, put it inside the 30mm car locket. Easily to clip on car air-conditioning vent, place it on office desk, use it at home or any other proper places that you prefer. You can use it in your car, office, home, bathroom, your trip and the perfume will around you. 1 5/8"L x 1 5/8"W x 1 7/8"H