Package Size: You will receive includes 60 pieces of hollow round diffuser refill pads the quantity is enough to meet your daily use and replacement. Size: 57x2mm/2.24x0.08inch 2.9cm/1.14inch inner diameter. You can check if the size you want matches the size of our product. Quality Material: Replacement pads are made of high quality wool material soft and comfortable easy to penetrate essential oils long-lasting fragrance and reusable can be changed according to your own frequency of use. Easy to Use: Essential oil replacement pads are easy to use. You first put the pad on the place where you want to drop the essential oils then put 3-4 drops of essential oils on the pad you can fully enjoy the scent of essential oils. Replace Regularly: You can put it in your car bedroom living room conference room bathroom office massage parlor library store hotel and so on to give off a nice aroma and delight your mood. Old essential oil pads will reduce the efficiency of the diffuser so it is recommended that you replace them once a month. Relax Body and Mind: Our reusable diffuser pads can be used well with essential oils or aromatic oils helping create a relaxing environment and providing comfortable living learning and working spaces. It is a good tool for calming the body and mind in a peaceful manner.