✓?Hygienic & Safety ?These refill caps reduce the risk of transferring germs and contamination. For avoiding cross-contamination between different users, the probe covers for ear thermometer must be replaced after each use. Note: To prevent covers pop off, please refer to the usage in the fourth picture. ✓? Reliable & Accurate ?These Braun ear thermometer covers will protect the tympanic thermometer from scratching and other impurities, which might affect temperature readings. Plus, less contact with the lenses, prolong the life of the ear thermometer. ✓?Great Material & Recyclable?BPA Free, all people including, kids, babies, infants can trust and use with confidence. Also, the head of the earmuff made of soft material has the elasticity to protect the child's soft eardrum. ✓?For All Braun Thermometer Models ?The thermometer ear covers are compatible for all Braun thermometer models including Braun thermometer lf20, Exactemp thermometer 7 IRT 6520, IRT6020, IRT6500, Braun thermometer 3 IRT3030, IRT3020, IRT4020, IRT4520 and so on. ✓?Same Function As Brand One? Extra thin top membrane of the Braun thermometer covers ensures highly accurate results.