Ten sealed ampoules, 300 mg of boldenone undecylenate per millilitre in each — the format Magnum Pharmaceuticals chose keeps every unit untouched until the glass is broken.
Boldenone undecylenate belongs to the injectable androgen group and was first formulated for horses under the name Equipoise. Structurally it is testosterone with a 1,2 double bond, a small change that reduces how much of it converts to oestrogen. Because the attached ester is long, the hormone enters the bloodstream gradually from each injection site, and both its onset and its clearance are slow.