Automatic Vaccinator / Syringe, Plastic Body, Luer Lock, Self-filling, Adjustable Dose, Re-usable(5ml/5cc) Plastic Body, Unbreakable Plastic Barrel, Luer Lock, Re-useable, Sterilizable 120c Durable syringe is designed for one-hand operation. Automatic self-filling syringe with spring loaded plunger offers unparalleled accuracy dose after dose. Easy dose adjustment system. Ideal for rapid use. Can be used for large animals, small animals.