Primoprime is methenolone in oil, put up by Eminence Labs as ten sealed glass ampoules of one millilitre, each carrying 100 mg. Ampoules are single-use by design - once the neck is snapped the contents are meant to be drawn in one go - and some people prefer that to a rubber-stoppered vial on sterility grounds.
Methenolone is a dihydrotestosterone derivative rather than a testosterone one, so there is no aromatisation and no oestrogenic activity attached to it. The acetate ester here is a short one, meaning the compound clears the system quickly and is administered far more often than the enanthate form of the same drug.
