The tank holds up to a 1/2 Gallon of your favorite injection fluid. It has FOUR large bore needles spaced out at the perfect distance. 

Out of the box, you will find the Injector fully assembled, all you have to do is clean it with HOT soapy water and bleach. Then flush it with clean hot water until all the soap and bleach is gone! (Make sure you do this before and after EACH use.)

When you're ready to inject, fill your injector at least a 1/4 full with your injection, pump up, and pull the trigger! You will notice whatever you are injecting will quickly start to expand as if you are filling a football with air.