The Ultima Pharmaceuticals Mass Stack 500 Mix brings nandrolone decanoate and testosterone enanthate together in one 10 ml vial, with a combined concentration of 500 mg per milliliter. Each injection delivers both compounds from a single draw, and the vial format suits those who prefer multi-dose glass over ampoules or pre-filled syringes. Ultima Pharmaceuticals, a USA-based company making injectable anabolic steroids since 2022, labels this blend by its total milligram strength rather than breaking down the individual esters on the front panel.

Nandrolone Decanoate and Testosterone Enanthate in One Vial

Nandrolone decanoate appears in standalone formats such as Tritrenabull vials, where the entire 10 ml carries only that ester. Testosterone enanthate runs separately in its own vials at concentrations from 250 mg/ml upward. This blend merges both into a single container, so two compounds arrive in one injection instead of two separate draws. The 10 ml glass vial holds enough liquid for multiple administrations, and the rubber stopper reseals after each needle puncture. Other labs offer nandrolone blends with shorter esters like phenylpropionate, but Mass Stack 500 Mix pairs decanoate with enanthate exclusively.