Size information: the diameter of the ceramic is 0.71 inches/ 18 mm, which is suitable for most of the catalytic aroma lamps; When purchasing, please pay attention to whether the diameter of the mouth of aromatherapy bottle matches the diameter of catalytic burner Harmless and strong: this wick of oil lamp wick is made of a mixture of various clay materials, forming a precise ceramic structure; The outer ring is made of Metal, and the metal structure can strengthen the protection of the wick to maintain its shape Good oil absorption: the good weaving of oil lamp wick has strong oil absorption, can be applied in combination with aromatherapy bottles and essential oils to efficiently and finely diffuse, which can bring fragrance into your room; Please note that the package does not include aromatherapy bottles and essential oils What you receive: there are 6 pieces catalytic wick replacements in 2 colors (silver and golden), each colors have 3 pieces, sufficient quantity can meet your replacement needs for air-controlled catalytic burner wicks Practical usages: after the essential oil is absorbed by the yarn core of oil wick, it uses the adhesion of essential oil to adhere to the hole of wick; This air control catalytic burner lamps wick is widely applied as an aromatherapy accessory to help disperse the fragrance and purify the air, creating a romantic atmosphere to your space