Sustanon 250 is an injectable oil-based testosterone blend containing four different esters of testosterone in one 1ml ampoule or vial: Testosterone propionate: 30 mg Testosterone phenylpropionate: 60 mg Testosterone isocaproate: 60 mg Testosterone decanoate: 100 mg This totals 250 mg of testosterone esters per 1ml. The mix of short-, medium-, and long-acting esters provides an initial quick...