The 4C-ES® Plus Tri-Pack Cell Control is a crucial tool for any laboratory or medical facility. This product comes in a pack of 12, each containing 3.3 mL of cell control solution. This solution is designed to help ensure the accuracy and reliability of your medical or laboratory equipment. It is intended for use only within the Continental US and is shipped directly from the manufacturer. Please note that this product is for professional use only and should be handled by trained personnel.