The applicator consists of a 800 mm long plastic tube with an inner diameter of 32 mm, which has a 265 mm wide handle. The position of the handrail is adjustable according to the size of the animal. The RF bolus is inserted into the esophagus by a stick that is widespread on one side so that it does not sneak into the rumen upon careless treatment. A long-necked container with a diameter of less than 30 mm is used to rinse the applicator after bolus administration.