?-MEASUREMENTS: The diameter of the disc is 4 inches (10.1 cm) the area where the oil or wax is deposited is 13/16 inch deep (2cm) see the exact measurements in the photos for complete information ?-PERFORMANCEB>Excellent if you use it with bulbs up to 35 watts, if you use bulbs below 20 watts you may notice slow melting due to low temperatures given off by low wattage bulbs, not recommended for bulbs of more than 50 watts due to high temperatures of bulbs of high wattage. Most of the lamps comes with bulbs between 20 and 35 watts ?-MATERIAL: glass they are susceptible to breaking if they fall from a height, this is a high tempered disc that can resist low impacts, high transparency that will allow light to pass through and smooth surface that will allow you to clean easily ?-INFO: It works in any application of melting wax or oil of aromas and devices it is only important that you verify the appropriate size of your need ?-ADVANTAGE: The purchase of multiple discs allows you to change between the aromas of your preference according to your occasion without having to throw away essential aromas not finished, just change the disc and you will be ready to go with new aroma You will receive the number of units you select in a compact package ready to use