Proper length: each fragrance oil lamp wick replacement measures . 14 cm, and the diameter is about 13 mm/ 0.5 inches, which is the regular size suitable for most catalytic aromatherapy lamps, and please check the size before purchase What can you receive: the package that you receive includes 2 pieces of oil lamp wick replacements, that the sufficient quantity provides you a wide choice to meet your burner wick replacement needs in Reliable and long-lasting: the catalytic core is made of various mixing materials of clay and fabric thread, manufactured by a good process to become a porous core, reliable and safe to apply, can service you for a long time Air control catalytic: the oil lamp wick can be lit with fire, or you can just put in oil bottles, and it has a good absorption effect, that can be applied with aromatherapy bottles and essential oils, bring fresh fragrance to your room Wide range of applications: these air control catalytic burner lamp wick replacements can be combined with any ordinary catalytic fragrance lamps, and you can put on the table, desk, living room, bedroom, kitchen, bathroom, , or other places, to purify air and give you a good mood