Revalor-XS is the first delayed-release combination implant. Each implant contains 10 pellets: 4 uncoated and 6 coated with X7™ polymer. The first dose goes to work immediately after implant, just like Revalor-IS. The second dose, shielded by the patented X7 polymer coating, goes to work after 70-80 days on feed – delivering the performance of a Revalor-S terminal implant. Each pellet contains 20 mg of trenbolone acetate and 4 mg of estradiol for a total dose of 200 mg of trenbolone acetate and 40 mg of estradiol. For steers fed in confinement for slaughter.