This is Chop's Power Injector Systems the 1/2 Gallon. Chop's 1/2 gallon is one of the best ways you up your game! Take the pain and suffering out of injecting. Save more time!! Comes with small 14 gauge 2 inch needles, 3 plug screws and 2 replacement plastic needle adapters. Closed Tip Needles are recommended for some injections.