1-Testocyp is dihydroboldenone cypionate, written DHB or 1-testosterone in most conversations, supplied in a 10 mL vial at 200 mg per millilitre. Structurally it is the 5-alpha reduced form of boldenone, so conversion to estrogen is off the table by chemistry rather than by suppression.
Cypionate is a long ester, releasing slowly from the oil depot, which puts injections days apart rather than daily. One trait is worth knowing in advance: DHB has an established reputation for post-injection soreness, noticeably more than most oil-based injectables. Dragon Pharma ships it sealed under a rubber stopper.