Using health pigment, safety and . The pads are reusable after washing.<br> They have liquid absorption and permeability. To keep absorbing essential oil, lead the travelled through pads and bring fragrance out.<br> To prevent swallow and blocking the airway. Please stay from children and pets.<br> It has liquid absorption and permeability. To keep absorbing essential oil, lead the travelled through pads and bring fragrance out.<br> colour: Random Color(White + yellow + black +blue+ + light green + purple + orange + gray + red +ice blue +green, can not color)<br> Material: Felt<br> size: Diameter: 22mm<br> thickness: 3mm<br> Package Contents: 48x mat<br> Only the above package content, other products are not included.<br> Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.