The key features of the thermometer covers: Compatible For all Ear Thermometer Models: Comportable for all common ear thermometer models including 7 Serie IRT 6520, 3 series IRT3030, IRT3020, IRT4020, IRT4520, IRT6020 and so on. Great Material: The ear thermometer probe covers are 0% BPA and 0% latex, all people including babies, infants can trust ..