Beurer FT 58 Thermometer Replacement Cap Set (x20) The replacement set for the FT 58 ear thermometer is made up of 20 single-use protective caps to ensure hygienic and safe temperature measurements. Keep your Beurer FT58 ear thermometer hygienic and well-stocked with this pack of 20 protective caps. Using a fresh cap for each measurement guarantees safety and cleanliness. This accessory is essential for the proper functioning and maintenance of your FT58 thermometer.