Pack of 4 for the UPC: 328785998214 Accurate Prevents cross-contamination Use only for accurate readings Braun-certified for consistent accuracy Easy to install and remove Disposable for your baby's safety Braun Thermoscan Lens Filters LF 40 are designed to ensure accuracy and to prevent cross-contamination with Braun Thermoscan home-use thermometers. These Braun Filters are Braun-certified for consistent accuracy. The filters for the Braun Lens, 40-count, are easy to install and remove and are disposable for your baby's safety. 
