The difference here is the number: 300 mg of testosterone cypionate per millilitre, where most of the category sits at 250. Magnum Pharmaceuticals supplies it in ten ampoules, so a heavier load of hormone arrives in the same one millilitre of oil. More concentrated solutions carry more solvent and tend to be a little thicker to draw.
Beyond that this is ordinary long-ester territory: testosterone with a cypionate chain, oil-based, intramuscular, and slow enough in release to count as a depot androgen. Magnum builds much of its injectable line at this same 300 mg/ml figure.
