Component E-C with Tylan Steer / Heifer Implant 100 DoseComponent E C with Tylan (Progesterone and Estradiol and Tylosin) Steer Heifer Implant 100 dose Growth implant to increase rate of gain in suckling beef calves weighing less than 400 pounds. Each implant contains 4 pellets with 100 mg progesterone and 10 mg estradiol. Each dose also contains tylosin, a local antibacterial. Elanco *This product requires a prescription from your veterinarian. They can submit it in a few different ways: Fax a