Three long esters share one 10 ml vial here, concentrated to 500 mg per millilitre: testosterone enanthate, trenbolone enanthate and nandrolone decanoate. Because all three are slow-release, the blend behaves as a long-acting preparation overall rather than something that peaks and disappears quickly.
Trenbolone enanthate is a 19-nor derivative that does not aromatise. Nandrolone decanoate is the oldest and slowest-releasing of the nandrolone esters. Testosterone enanthate supplies the base androgen. Pharmacom Labs builds its numbered Pharma Mix line out of fixed factory ratios like this one.