Thymosin Alpha-1 supplied as a pre-filled, multi-dose research pen. Each pen is reconstituted in 2.4 mL of bacteriostatic water and ready to dose by clicks (0.01 mL per click), with no mixing and no draw-up. Cold-chain shipped and stored refrigerated at 2 to 8 degrees C. For laboratory and research use only. Not for human or animal consumption.