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 and use with confidence. Protect the Lens: The probe covers can protect the lenses of the thermometer from scratches and impurities. Ensure the accurate: Extra thin cover ensure the high accurate measurement. More Hygienic: Replacing the cover after each use can avoid cross-contamination between different users. The right way to use the thermometer covers: 1:Clean the lens of probe2:Get on the cover3:Measure temperature4:Get off the cover What you get: 5 boxes*20 Pcs of ear probe cover